The F Series fins by FCS are performance surfboard fins specifically designed for tight pocket surfing. The Inside Foil Technology increases acceleration through turns and allows for a shorter turning arc. And if weight is bogging you down, this is the fin for you. It's made from the lightest fin material available - an ultra light epoxy. The flex pattern is slightly softer that the Glass Flex adding even greater response. Comes with three fins (two blue side fins and a white center fin) and a fin key.

• Base: 4 6/16"
• Depth: 4 1/2"