The Future fins fk2 keel fiberglass fins is a smaller variation of the K1 twin, the same technology and foils keep the flow alive while giving a bit more looseness. Similar to a glass-on feel, these fins can have a lot of flex (its flex is directly related to thickness). This is generally a stiff fin unless it is very thin.

Specs:

Height: 4.63 in - 11.8 cm
Base: 6.62 in - 16.8 cm
Area: 22.24 in² - 143.48 cm²

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