This Block Surf California Tri-Fin Set comes with (3) fins and screws for easy installation. It can be used as replacement fins for soft surfboards, bodyboards, and stand up paddle boards.
The bodyboard twin fins have 4 screws (or 6 for the tri-fin) separated by 4 inches, with a fin base to tip length of 3.5 inches and screw length of 2 inches. These fins also feature easy to install screw-in pins for each fin, allowing for a customizable size and shape with a sharp knife (at your own risk).
The set includes 6 screws for the bottom of your bodyboard and are made of flexible and durable plastic. To install, simply punch four holes through your board and pop the screws through to connect with the fins on the bottom.
Specifications include a distance of 4 inches between screw holes on the fin, a skeg length of 5 inches from front to back along the base, and a height of 3
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surfboard fins with adjustable setups-Block Surf California Tri-Fin Set
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