SBS 8" Longboard & SUP Single Fin - Free No Tool Fin Screw - 8 inch Center Fin for Surfboard & PaddleboardThe Santa Barbara Surfing 8" fin is a perfect fit for Longboards and Standup Paddleboards either with or without side fins. Fits any US standard fin box and comes with both the brass slider pin and the fin screw and plate. Great for surfing, no..