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K4 FinsK4fins have created a unique and new material for windsurfing. OptoFlex is a molded resin long fibre matrix that has been carefully manipulated to provide the perfect flex patterns for windsurfing. Our K4 technicians took a long time to create the perfect material with the qualities needed to provide the performance we now appreciate. Lighter, snappier and with outstanding flex memory. The fins are extremely robust too -we haven't had a single return through breakage. K4 fins have tested the highest grade materials in the lab and on the water for nearly two years, continually improving the aesthetics and the performance. ![]() K4 'Bubble' Freestyle - £42.50K4 'Bubble' Freestyle Fin from k4 fins on Vimeo. The K4 Freestyle fin developed by Andy 'Bubble' Chambers. K4 originally had two very different...K4 Blankers Full US Slot - £10.00K4 Blankers Full US Slot product information ...K4 Blankers MT - £5.00K4 Blankers MT product information ...K4 Blankers Standard Slot - £5.00K4 Blankers Standard Slot product information ...K4 Blankers US - £3.00K4 Blankers US product information ...![]() K4 Carve - £22.50Our front fin for drive and control. Great for big sweeping carves and gouges. Swept flexy tip for maximum grip, high rake for control and wide...![]() K4 Flex - £47.50The K4 original fin for performance wave riding. Lots of flex for amazing grip and looseness on the wave. Raked template for control. A...![]() K4 Shark Tooth - £22.50Our front fin for looseness and speed. If you're getting all the grip and drive you need from the rear fins, this is a great front fin for...![]() K4 Stubby Large - £47.50The K4 stiffer and larger area line of fins. Great for heavier riders applying greater power in high wind and wanting more drive in low wind. Also... | Visit our store
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