Description: Package Contains: Package content 1 Surfing Fin, 1 Slot, a wonderful accessory for surfboards.Premium and Reliable: This surfing fin is made of high quality nylon material, which is wear resistant, strong, and durable, and can be for a long time use.Feature: Surf fins are designed with good workmanship, and provide stability, balancing steering maneuvers, and traction; slide in, detachable center fin with nylon strap for loss and fall off.Easy Installation: Easy to install and remove fin, just slides in and secures in matter of seconds, without any tools.Wide Application: Surfboard fin thruster is suitable for longboard, surfboard, and stand up paddleboard, providing good hold in both flat waters paddling and turning around. Specification: Material: Nylon Color: Black Size Chart: Fin 18.3cmx11.3cmx3.2cm/7.20inchx4.45inchx1.26inch Slot 21cmx7.8cm/8.27inchx3.07inch Package Includes: 1 Surfing Fin with Slot Note: Please allow slightly errors due to manual measurement and different monitors.