ITEM NAME:2Pcs Longboard Fins Clip Tracking Fin Fin Buckle Accessaries Fittings 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: 2 Piece Surfboard Fin Clip Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! DMO0003732519511011.Suitable for most of the Fins. Used to lock the fin after we insert it into the base to stop it from falling off. 2 Piece Surfboard Fin Clip. Color may be slightly different since different monitor.