ITEM NAME:Surfboard Fins Surf Fins Clip with a Short Thread Replacement For Most of the Description: Made of qualified nylon, solid, reinforced, durable and strong. Used to lock the fin after we insert it into the base to stop it from falling off. Come with a short thread. Suitable for most of the Fins. Specification: Material: Nylon Color: Black Size(LxW): 4.1x1.4cm / 1.6x0.6inch Package Includes: 1 Piece Surfboard Fin Clip Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! SKU: DMO0019946054045290.1 Piece Surfboard Fin Clip. Suitable for most of the Fins. Used to lock the fin after we insert it into the base to stop it from falling off. Made of qualified nylon, solid, reinforced, durable and strong.