Item Type: Rudder Groove Material: Plastic Weight: Approx.96g/3.4oz Slot Size: Length: Approx. 11.4cm/4.5in, Total Length: Approx. 15cm/5.9in Slot Size: Width: Approx. 8mm/0.3in, Total Width: Approx. 3.1cm/1.2in 1Made of high quality plastic material, it is sturdy, durable and long service life. 2Lightweight and practical, simple design, convenient installation and disassembly. 3After rigorous testing to ensure excellent quality, it is an excellent accessory for surfboards. 4The rudder groove of the surfboard can keep the surfboard fin stable and prevent it from falling off. 5It has high toughness and impact resistance, and is equipped with screws and fin key, which is more convenient to use. 3 x Rudder Groove 1 Bag x Accessories