| Rainbow Fin's TK Flex longboard fin was designed as a single fin for small spoon boards in the 70's. Smaller versions were introduced to add extra snap on turns with tri-fin longboards for intermediate to advanced surfers.
List your top three color choices in the comments section of the check out page and we will do our best to fulfill your request. If we do not have one of your choices in stock we will contact you before filling the order.
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