Flying Diamonds CJ Involvement Fin-Amber Size_5.7m (Strut Only) Innovative double action hinge system

Innovative double action hinge system for light weight and durability

Molded #10 PK non-corrosive zippers

Valve is on a 4" peel and stick base

CI's new Thermo Press grip pattern utilizes the same BioGrip EVA with an added production process hat presses our Mixed Groove pattern to reduce the overall thickness while sealing off the EVA foam

designed for the long haul whether you’re going on an extended surf trip or week long vacation

Flying Diamonds CJ Involvement Fin-Amber Size_5.7m (Strut Only) Innovative double action hinge systemThis fin is a classic. Drawing on the simple and proven designs of our forefathers, we added subtle elements to this design to optimize it for speed and added power through turns. Clean, simple lines and perfect mid range flex. The Function first concept makes this fin one of the easiest riding fins weve ever come across. Lots of control and drive in a beautiful package. A great choice for any single fin longboard.