Our Santa Barbara Surfing 10in fin is a perfect fit for Longboards and Standup Paddleboards either with or without side fins. A good fit for a bigger longboard (9' and longer) and/or a bigger surfer. Fits any US standard fin box and comes with both the brass slider pin and the fin screw and plate. Great for surfing, noseriding, and flat water touring. Ready to put on your board and get in the water. Direct fit for all standard fin boxes of longboards and surfboards with single or tri 2+1 fin setups. And for sups that includes all paddleboards including BIC Stand Up Paddleboards and other popular Paddle Boards found at REI and other outlets. There are some inflatable paddleboards this will not fit on, refer to the photos. This sup fin will get you on the water and stoked out of your mind. This Sup fin is a great paddleboard accessory and would be a great paddleboard gift. Purchase our sup fin and get a free sticker as well as all the free hardware: fin screw and plate, and brass slider pin. Compatible with: 99% of SUPs All Hard SUPs All Fiberglass SUPs All Epoxy SUPs Tower Xplorer 14' iSUP (Version 2) Tower "Adventurer 2" 10'4" x 6" iSUP Tower Classic 10’6” Tower Mini 7’10” Carbon Cross-Link SUP Tower Fit 10’6” Carbon Cross-Link SUP Tower Social 11’5” Carbon Cross-Link Tower G-SUP 10'6" All-Around Tower Weekender 12’6” Carbon Cross-Link SUP Tower Competitor 12’6” Carbon Matrix Bic Sport Peformer Bic Sport Peformer Soft Bic Sport Peformer Wind Bic Sport Cross Bic Sport Cross Soft Bic Sport Wing Bic Sport C-TEC TRACER Bic Sport C-TEC Wave Bic Sport SUP AIR Bic Sport SUP AIR RIVER Bic Sport SUP AIR TOURING Bic Sport SUP AIR WIND Bic Sport DURA-TEC ORIGINAL Bic Sport WIND Bic Sport SUP AIR WIND Bic Sport BISCAYNE Bic Sport NOVA SCOTIA Bic Sport TORRE Bic Sport THE PASS Many More.....