I need to order a new fin, however I have no idea what fin box I need?

Odds are that unless you have a very old board, you need one of the following five fin box styles to replace your fin with.















Tuttle box and Deep Tuttle box, are very similar. Tuttle box (also refered to as standard Tuttle) is used in small to mid sized free ride boards. Deep Tuttle is used on wide boards that require large fins. The base is about 3/4" deeper than a standard Tuttle box. You can use a standard Tuttle fin in a deep Tuttle box, but not vice versa. Both attach with two screws down from the deck.













Power box attaches with one screw right though the middle of the fin base. By far the most convenient of the fix boxes, it is used with beginner, freeride, freestyle and wave boards.














Trim box fins have a tab at the front that hooks into the board, the fin pivots back and is attached by one screw from above. The Trim Box can be adjusted for and aft by moving sliding spacers in the box.













US Box, A Box or E Box pivot forward from a pin in the back. They are held at the front by a machine screw and large thin nut. Used mainly on wave and freestyle boards, it was formerly the most popular style of box. They are based on a surfboard finbox design.