evo.com | Catch Surf Fins > If your single fin for the Plank has seen better days, a simple replacement with the Catch Surf Plank Single Fin should do the trick. Fiber-Filled Plastic Perfect mix of stiffness, flex and response. Includes One (1) Fin with Mounting Washer / Screw Replacement Single Fin for Plank | Catch Surf Plank Single Fin 2026 - 7.5 in Black | Plastic