
Twin Fin Carbon - Performance - Future Compatible
Über das Produkt
Nachhaltige Twin-Surf-Finne aus recyceltem Carbon - passend für dein Fishboard.
Das Performance-Modell mit weniger Flex. Die Finnen sind 1,4 mm stärker als das Intermediate-Modell. Sieve Fins nachhaltige Twin-Fins sind für dein Fishboard und schnelle Rides gemacht. Diese Finnen sind für Drive, Speed und lange Bottom Turns konzipiert. Das Carbon sorgt für eine noch höhere Festigkeit der Finnen und mehr Drive. Das Material macht die Finne außerdem sehr leicht.
Hergestellt aus recyceltem Carbon. Produziert in Deutschland. Kürzeste Material- und Produktionswege.
- Set: 2 Finnen
- Ideales Surfboard: Fish & Twin
- Fin Boards Material: recyceltes Carbon und Kunststoff
- Kompatibilität / System: Future
- Größe: M (siehe Spezifikationen)
Die Oberfläche der Surf-Finne wird durch eine flache Texturierung (0,2 mm) veredelt, um dem Anspruch von Sieve Fins an ein hochwertiges Design gerecht zu werden. Produziert und entwickelt in Zusammenarbeit mit der Firma Reichle GmbH.
Um Sieve Fins im Kampf gegen die Verschwendung von Ressourcen zu unterstützen, können Sie auch einzelne Finnen nachbestellen. Beim Versand achten wir darauf, die Verpackung auf ein Minimum zu reduzieren, um unnötigen Verpackungsmüll zu vermeiden.
Twin Fin - Spezifikationen - Größe
- Basis: 138mm 5,4''
- Höhe: 139mm 5,5''
- Neigung: 7º
- Neigung: 36,3°
About the brand
Nachhaltigkeit
Warum ist dieses Produkt eine MARKTFÜHRENDE ÖKO-LÖSUNG für den Umweltschutz?

YouTube
Schaue dir unsere neuesten Videos mit Tipps zum Shaping und Produktinformationen an. Weitere Videos findest du auf unserem Kanal. @ecosurfsupply
You haven't found the right fin for your board yet? Take a look at our other fins
Do you have all the essentials for your upcoming surfing trip? Check out our surf equipment
Informationen zum Versand
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Kundenfragen
Become a partner! Let's work together to make surfing and the industry more sustainable! What we are looking for:
Please send us all your details to adrian@ecosurfsupply.com with a catalog of your products and why you think you would be a good fit for us. If you have it, also your distribution conditions.
What we are looking for:
- I do produce sustainable products for the surf industry and want to be a partner and/or
- I am looking for an europe wide distributor for my products and/or
- I am missing a product that I would like to suggest to you and/or
- I have a new innovative sustainable idea and need resources (equipment, knowledge, etc) in order to realise it.
Get involved: Become part of the Team
Our jobs are both very diverse and specialized, which means we are able to welcome a wide range of profiles, all sharing our passion. Get involved!
Shape your board at our Eco Shape Land
Most surfers would love to shape their own board, but do not have the tools, knowledge or facilities to do so. That is why we have created a magical place called Eco Shape Land, where board lovers, who want to learn the art of shaping are welcome to discover the secrets behind making a board. It is also a cool and relaxed place for experienced shapers, who just need a space to make their dream board become a reality.
For just 15€ per hour, we offer a fully equipped professional shape room, equipped with a vacuum system, fan and all the tools you need for an awesome shaping experience (there is an extra charge for tool hire). Please contact us o via the contact options listed below to send us your request and discuss the details with head shaper Adi.
If you are an inexperienced shaper, there are shaping workshops run by one of our in-house shapers that will give you all the knowledge you need to shape your own board. Check out our workshop page for more information on the different programms we offer.
Shape your board at our Eco Shape Land
Most surfers would love to shape their own board, but do not have the tools, knowledge or facilities to do so. That is why we have created a magical place called Eco Shape Land, where board lovers, who want to learn the art of shaping are welcome to discover the secrets behind making a board. It is also a cool and relaxed place for experienced shapers, who just need a space to make their dream board become a reality.
For just 15€ per hour, we offer a fully equipped professional shape room, equipped with a vacuum system, fan and all the tools you need for an awesome shaping experience (there is an extra charge for tool hire). Please contact us o via the contact options listed below to send us your request and discuss the details with head shaper Adi.
If you are an inexperienced shaper, there are shaping workshops run by one of our in-house shapers that will give you all the knowledge you need to shape your own board. Check out our workshop page for more information on the different programms we offer.
Impressions of our Eco Shape Land









The Eco Surf Supply newsletter
No matter if you are a professional or hobby shaper or just a passionate surfer, we got you covered.
Join the family now! Don’t miss out on ...
- the arrvial date of the blank container,
- the start date and news of our Agave Blank delivery tour,
- updates and information on all our new products,
- exclusive updates on upcoming events,
- early access on our product catalogs
- and discounts/promotins that will make you smile.
Join the family now! Don’t miss out on ...
- the arrvial date of the blank container,
- the start date and news of our Agave Blank delivery tour
- updates and information on all our new products,
- exclusive updates on upcoming events,
- early access on our product catalogs
- and discounts/promotins that will make you smile.
Our headquarter is in Munich, Germany. But we sell online all over Europe. To avoid long shipping distances and to offer you the best possible delivery conditions, we have blanks in stock for you in France, Spain, Portugal and the UK. In addition, we are regularly on delivery tours to get in touch with you and explain to you personally how you can work with our products. We are also present at various exhibitions and festivals. For the latest information and updates on upcoming events, sign up to our newsletter. More questions? Don't hesitate to contact us directly.
No, there are many ways to waterproof a blank. Instead of using a toxic polyester resin, we recommend using a bio-based epoxy resin. Another option is to vacuum the blank with more waterproof veneers or woods such as Paulownia.
Yes, we are sharing our many years of experience with you on our YouTube channel. For more information on agave shaping, we also have different types of workshops available. Please visit our workshops page for more information.
We offer surfboard shaping workshops in which we explain the individual work steps in detail. If you want to try it all yourself, we offer different kits that give you everything you need to build your own eco surfboard.
Become a partner!
Let's work together to make surfing and the industry more sustainable!
What we are looking for:
- I do produce sustainable products for the surf industry and want to be a partner and/or
- I am looking for an europe wide distributor for my products and/or
- I am missing a product that I would like to suggest to you and/or
- I have a new innovative sustainable idea and need resources (equipment, knowledge, etc) in order to realise it.
Please send us all your details to adrian@ecosurfsupply.com with a catalog of your products and why you think you would be a good fit for us. If you have it, also your distribution conditions.
Whether you're a professional shaper, a hobby shaper or a passionate surfer, we've got you covered.
Subscribe to our newsletter! Don't miss out on:
• News about upcoming delivery tours
• Discounts and promotions that will make you smile
• Shaping tips and tutorials
• Updates and information on new and interesting products
• Content about sustainability in surfing
• Behind-the-scenes insights from Eco Surf Supply, that we want to share with you :)
• Updates on upcoming events
For just €50 per half day (6 hours) we offer you our fully equipped shaping bay in Munich. It includes a shaping room, a sanding room and a laminating room, all equipped with the necessary machines. Consumables are charged separately, but we have all the important shaping materials in stock to save you unnecessary delivery times and to provide you with high quality and sustainable materials.
Send us your request to info@ecosurfsupply.com or by using or contact form and discuss the details with our head shaper Adi. For beginners we also offer Shaping Workshops. These are run by our experienced shapers and will give you the knowledge you need to shape your own board. Check out our workshops page for more information.
Our headquarter is in Munich, Germany. But we sell online all over Europe. To avoid long shipping distances and to offer you the best possible delivery conditions, we have blanks in stock for you in France, Spain, Portugal and the UK.
In addition, we are regularly on delivery tours to get in touch with you and explain to you personally how you can work with our products. We are also present at various exhibitions and festivals. For the latest information and updates on upcoming events, sign up to our newsletter. More questions? Don't hesitate to contact us directly.
We are an European distribution and offer international delivery. In the link below, you will find detailed information about our delivery times and shipping prices for surfboards and blanks and smaller products within different regions, including Europe, EU island territories, and non-European destinations.
The following link will take you to our workshop page, where you will find lots of information about the workshop process, price and dates. At the bottom of the page you will find specific FAQ's about the shaping workshop.
If you would like a personal consultation, please give us a call or send us an e-mail.
The following link will take you to our About agave page where you will find lots of information about production, sustainability, the shaping process and the performance of agave. At the bottom of the page you will also find specific FAQ's about agave blanks. If you would like a personal consultation, please give us a call or send us an e-mail.
The following link will take you to our surfboard store. Here you have the choice of famous board models of well-known shapers from Europe.
If you want to order your own vision of your surfboard, you can send us your custom request and we will create your dream board from agave. If you would like a personal consultation, please give us a call or send us an email.
After we have discussed which material and which constructions you would like to have for your surfboard, we design your dream board together on the computer to get the right dimensions for you. Then you create your real board together with us, this can take about 3-7 days depending on the construction and material you choose. You will get more information on our workshop page.
No, there are many ways to waterproof a blank. Instead of using a toxic polyester resin, we recommend using a bio-based epoxy resin. Another option is to vacuum the blank with more waterproof veneers or woods such as Paulownia.
You can work the agave with the same tools as with conventional foam. We recommend working with the planer as much as possible, as this is originally made for wood and cuts the agave even better than you are used to with foam.
It is good to know that there are 10 to 30 different agave plants in a blank. Growblanks has the ability to offer 3 different densities because of their enormous ranch of plants on the farm which they sort into very light, light and standard poles. When sanding it is important to understand that there are multiple plants in your blank that may have naturally slightly different densities. This can be a little challenge when sanding the nose and tail. Sand with care, watch in between! Learn more about each working step with the agave blank on our tutorial page:
Sure, you can cut an agave blank as regular foam blanks in a CNC Machine. We have successfully tested the Agave blank on all traditionally used CNC machines.
The cleanest cut is produced by the machine with milling blades, which is also used to produce our factory cuts. The following link will take you to our CNC page, where you can find more information about our cutting service. Which machine we use, what kind of cuts we produce, which type of cuts you can order from us and price information.
You can draw your finboxes and cut them as usual. We recommend the use of UFP finplugs. The most versatile and strongest finplugs, that are suitable for Futures and FCS systems. The only finplug on the market with recycled content. Learn more about how to set you Finboxes in right on our tutorial page:
Agave's ingenious fibre structure makes it much stronger than conventional foam, while still being extremely light. The stability is in the blank itself, the job is to make it water tolerant and resistant in the long term. The sealing step, in which the fibres of the blank get closed, is more important than the lamination itself. The Sealing makes the blank water-resistant and prevents it from becoming soaked. After you have successfully applied the sealing to the Agave board, you can laminate the surfboard as usual.
Regarding the durability of the surfboard, we recommend laminating it with bio-epoxy resin and a fibremat material of your choice. This construction makes the agave board extremely stable and resistant to dings, which is a significant advantage from a sustainability perspective: The high stability reduces the need for new production and therefore the consume of resources. It is also possible to laminate with polyester resin.
For laminating tips with the Agave, learn more on our tutorial page:
It is necessary to make a filler coat with Eco Epoxy and Aerosil (silica) 50/50 by volume.
WHY?
The fiber structure of agave is full of air, similar to a long bundle of straws. This feature makes the Agave so light but also strong. It is also beneficial in case of dings, as water will run along the grain and not penetrate the core of the surfboard. Before lamination, it is important to close the fibers with a sealing step, similar to EPS foam.
Learn more about how to make a sealing on an agave Surfboard on our tutorial page.
Our partners in Kenya “Growblanks” cut around 500 agave stems per day during the harvest season. The flower stems are sorted into different densities, standard, light and very light. Each plant grows with slightly different characteristics. Only the large mass makes it possible to sort them according to similar density characteristics and glue them together into blanks. Thanks to years of experience and harvesting, the farm is also able to replant the premium plants to ensure the best possible quality for the blanks.
The blanks do not have a stringer but a middle pole that shapers can use as a guide. Here you simply mark half of the middle stem and can be sure to have the center. Why the Agave blanks don't have a stringer is because they don't need it due to their fiber structure. You can imagine that the entire blank consists of many stringers. The only difference is that they are holistic, like a lot of straws close together. This makes them incredibly light, but also very stable.
Yes, agave is the natural material that is most similar to foam. You can CNC mill the agave, but you can also handshape it. Before lamination, the agave needs a sealing step, as with EPS foam. The following link brings you to our tutorial page, where you will be guided step by step through the working steps with the agave:
You can compare our very light blanks with the weight of a standard PU foam. Our standard is about 100-300g heavier than a standard PU foam if we dont hollow it out, otherwise it could be the same. It is important to note that there is more to the weight of a finished surfboard than just the core material.
We’ve got 14 different sizes and for every size, 4 different densities:
- Super Light 45-50 kg/m³
- Very light: 50-55 kg/m³
- Light: 55-60 kg/m³
- Standard: 60-65 kg/m³
The Agave has similar properties to foam in terms of flex and weight.
One difference is the pleasant rebound effect of the agave, which can also be found in skis or skateboards. This gives the flex life, as the board reacts much more intensively to the surfer's forces. It is important to mention, however, that this type of detail can only be felt by very experienced surfers
Our head office and largest blank warehouse is in Munich. To avoid long delivery distances and save you high delivery costs, we have Blank stocks in almost all surf hotspots in Europe. We are happy to have partners in Spain, Portugal, France and the UK who offer finest CNC preshapes for you in addition to local blank delivery.
We can confidently recommend the Agave for all shape types from longboards to performance shortboards. Agave is particularly suitable for boards that require high resistance, such as tow in boards, guns, foil boards and kiteboards.
The source of our agave blanks comes from a company based in Kenya called Grow Blanks. They are the first & only agave surfboard blank producing company in the world. Grow Blanks is based on one of the world’s largest agave sisal fibre producing farms with exclusive access to a vast amount of raw material. This allows Grow Blanks to produce blanks in quantities that can make a meaningful impact in the surf industry. Learn more about production, sustainability, the shaping process and the performance of agave here:
The agave plant is not a tree; it is actually a succulent. At the end of its lifespan, it grows a pole. Grow Blanks harvests these poles, dries them, and cuts them into pieces that form the blanks. The blanks are glued together at a ratio of 2:1 (water to wood glue). Grow Blanks delivers a unique quality of agave blanks worldwide. Each blank contains 18–25 stems. Grow Blanks sorts the material into four different density categories to provide consistent quality. This makes the shaping process easier and improves the performance of the boards.
Agave behaves like any other wood when exposed to water. As long as it can dry out well, there are no problems. Similar to certain types of foam, the structure of agave is absorbent. We therefore recommend that you use one of our primers before laminating or covering the board with other woods. If you do get a ding, we recommend either using our quick fix tape to continue surfing or allowing the board to dry out properly and to seal it again.
You can work the agave with the same tools as with conventional foam. We recommend working with the planer as much as possible, as this is originally made for wood and cuts the agave even better than you are used to with foam.
It is good to know that there are 10 to 30 different agave plants in a blank. Growblanks has the ability to offer 3 different densities because of their enormous ranch of plants on the farm which they sort into very light, light and standard poles. When sanding it is important to understand that there are multiple plants in your blank that may have naturally slightly different densities. This can be a little challenge when sanding the nose and tail. Sand with care, watch in between!
Learn more about each working step with the agave blank on our tutorial page
Similar to the aerodynamic shape of airplane wings, surfboard fins have a foil – a tapered design that varies from thick at the center to flatter at the edges. This 'bulbous' shape provides lift and influences the board's performance. The fin foil differs based on the type of fin (single, twin, thruster), with side fins often having a flat or slightly inward-curved profile. Center fins typically feature a symmetrical or 50/50 foil on both sides. The diverse foil designs cater to different surfing styles and board configurations.
Rake and Sweep play a crucial role in surfboard fin design. Rake refers to the length of the leading edge, while Sweep is the angle from the base center to the highest point. A smaller rake, with a shorter leading edge, offers stability and a straight appearance, limiting pivot for a controlled feel. In contrast, a longer rake allows for more turns, providing a looser feel. These factors influence how well the board turns on a point. For a comprehensive guide on Rake and Sweep, check reputable online sources for detailed insights into optimizing your surfboard's performance.
SIEVE Fins and us, the Eco Surf Supply team, are committed to minimising waste and conserving resources. To support our sustainability efforts, we offer the option to reorder single replacement fins. Simply drop us an email with specific details about the fin you need (Future/FCS, front left/front right/centre, colour etc.), and we'll take care of the rest. Help us make a positive impact on the environment – order your single replacement fin today!
We offer surfboard shaping workshops in which we explain the individual work steps in detail. If you want to try it all yourself, we offer different kits that give you everything you need to build your own eco surfboard.
The Agave Blanks are manufactured using standard wood glue, which is a mixture of melamine, urea, phenol and formaldehyde. The glue is solvent free (VOC free), organic and 100% biodegradable. As it is pH neutral, there is no discolouration with difficult woods. The wood glue is diluted with ⅔ water and then applied very thinly so that the glued surface is not felt when sanding.
Our standard is about 100-300g heavier than a standard PU foam if we dont hollow it out, otherwise it could be the same. It is important to note that there is more to the weight of a finished surfboard than just the core material. We’ve got 14 different sizes and for every size, 3 different densities:
- 50-65 kg/m3
- 60-80 kg/m3
- 80-95 kg/m3
After we have discussed which material and which constructions you would like to have for your surfboard, we design your dream board together on the computer to get the right dimensions for you. Then you create your real board together with us, this can take about 3-7 days depending on the construction and material you choose. You will get more information on our workshop page.
The agave plant is not a tree but actually a succulent. At the end of the plant's life span the plant produces a pole. Depending on the plant's variety and ecological conditions this only happens once in 6-10 years. Grow Blanks harvest these poles, dry them, and cut them into pieces that form the blanks. The blanks are glued together under no tension using non-toxic wood glue. These blanks are uniquely crafted as similar densities are separated to form a consistency in the blank that makes it easier to shape and perform better as a final product. Each blank is hand-made and unique!
Agave is a very foam-like material and surf similarly. A fundamental aspect that other types of wood do not really offer is the flex that agave, like foam, allows.
Yes, we are sharing our many years of experience with you on our YouTube channel. For more information on agave shaping, we also have different types of workshops available. Please visit our workshops page for more information.
If you are not from Europe, you are welcome to order your blanks directly from Grow Blanks. Feel free to drop them a message.
Agave behaves like any other wood when exposed to water. As long as it can dry out well, there are no problems. Similar to certain types of foam, the structure of agave is absorbent. We therefore recommend that you use one of our primers before laminating or covering the board with other woods. If you do get a ding, we recommend either using our quick fix tape to continue surfing or allowing the board to dry out properly and to seal it again.
There are several ways and materials to make a surfboard waterproof. Unfortunately, in our opinion, none of them are 100% ecological. However, we are always open to progress and have tried many things over the years, which we will discuss in more detail in future videos. Personally, we have always opted for bio-epoxy glassing because the best sustainable solution is not only about the materials used, but also the longevity of the end product. We support any current method that moves in the direction of progress and will continue to share our knowledge with you so that you know what to look for when buying your next surfboard or shaping it.
Yes, upon request, we also cut foam blanks.
Of course, you are welcome to bring your own blank. We will pre-cut it to your specifications!
Yes, we offer quantity discounts for larger orders. Contact us for a personalized price quote.
On average about 30% cheaper, but it depends on the number of cuts. We can cut foam twice as fast, but the machine must be properly cleaned afterwards. This ensures that we can maintain and properly dispose our 100% organic agave dust. The plastic dust from the foam blanks must be disposed of at an additional cost.
We can do pre-cuts from 4 to 14 feet, with a width of up to 39 inches.
Yes, we ship worldwide. Contact us to get an accurate shipping quote for your location outside of Europe.
No problem! Simply contact us via the contact form or email, and we'll help you create a custom file.
After we have discussed which material and which constructions you would like to have for your surfboard, we design your dream board together on the computer to get the right dimensions for you. Then you create your real board together with us, this can take about 5-7 days depending on the board type and design you choose. You will get more information on our workshop page.
On our shaping workshop page you can find informations about the workshop process, price and dates.
To save your spot:
- Leave your details in the contact form.
- Schedule a free call with the shaper to start designing your dream surfboard.
- Receive a personalized price offer.
- Pay your deposit to reserve one of the limited spots.
Among our vouchers you can also give your loved ones a unique workshop experience with us.
- The world's most eco-friendly blank
- Made from 100% pure agave
- 100% biodegradable
- Made from 2/3 recycled polyurethane foam
- 100% recyclable
Kontakt

Josefstraße 23
Halle 50 a, 82178 Puchheim
Germany

info@ecosurfsupply.com

+49 (0) 1732054799