AK6 Hex-Core Thruster Fins


AK6 Hex-Core Thruster Fins are compatible with Futures. fin boxes. Performance down the line thruster, perfect for clean medium sized surf.

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AK6 Hex-Core Thruster Fins

  • Hex-Core
  • Bio-Resin
  • Thruster Set

The AK6 Hex-Core is a drive orientated fin with incredible low-end power and engineered tip flex, optimizing high-end control. The Hex-Core reduces weight and works in conjunction with the engineered flex.

Front Fins:  Height: 4.59″  |  Base: 4.4″  |  7° cant  |  Flat Foil
Center Fin: Height: 4.62″  |  Base: 4.39″

Ideal Board & Conditions:
Performance down the line thruster, perfect for clean medium sized surf.

Flex Rating:
Medium stiffness for good hold in bigger surf.

Medium: 65kg – 80kg / 145 – 175 Lbs

Compatible with Futures. fin boxes. 



The Hex-Core reduces weight and works in conjunction with the engineered flex.


AK Epoxy Bio Resin

AK uses Entropy Plant-based Bioresin to replace the normally harmful resins that are used in making fins.

Shipping Costs

  • UK: FREE standard delivery of 1-5 working days (usually 1-2 days) on all UK purchases over £79.99 – Upgrade to Express Delivery for £4.99 UK Orders under £79.99: £4.99 Standard, £6.99 Express
  • Europe Mainland and UK Highlands & Islands: £14.99 on all items under 2 kg and £19.99 over 2kg
  • Rest of the World and European Islands: £19.99 for small items under 2kg, £39.99 over 2kg and £69.99 for all items over 6kg. Fedex available as an upgrade option for all countries and the only option for Asia, Africa and South America
  • Surfboards and SUPs have an additional £29.99 shipping cost. Due to a huge percentage which have arrived damaged we now only use reliable (more expensive) couriers
  • Please note that Duotone products shipped to the US will receive a shipping excess of £250.

VAT (Tax) Free

If you live outside the EU or have a BFPO address, you are eligible for VAT free (20%) purchases so can save a lot of money. This is automatically deducted at checkout but please contact us if you would like further information. The prices shown on the website include VAT as standard until you enter your shipping country at the shipping Basket/Checkout page or are already logged in.


If for any reason you are unhappy with your purchase, you can return it to us in its original condition (with packaging and tags intact) within 14 days of the purchase date. We can either issue an in store credit for the item, send a different size or product if you would like an exchange or refund your payment.

Pay over 3 months with PayPal

Buy now, pay later. PayPal Pay in 3 is the most reliable and simple way to split the costs of a purchase over a longer period without any extra costs. Fast and easy to set up, this is our suggestion for the best free and easy finance package

Just choose PayPal at checkout and go through the options available

PayPal Credit

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