1,Made of high quality nylon plus fiber, sturdy, wear-resistant and lightweight, won't add much too weight on surf board. 2,Can withstand water pressure and resistance to UV damage, durable for long time use. 3,The slot is cut delicately, can firmly hold the fin. 4,Easy to install and use. 5,Universal for surfboard, nice accessory for surfing lovers. This fix box is made of high quality material. The slot is cut delicately, can firmly hold the fin. Easy to install and use, a great choice for all users. Features: Made of high quality nylon plus fiber, sturdy, wear-resistant and lightweight, won't add much too weight on surf board. Can withstand water pressure and resistance to UV damage, durable for long time use. The slot is cut delicately, can firmly hold the fin. Easy to install and use. Universal for surfboard, nice accessory for surfing lovers. Specification: Condition: 100 percent Brand New Item Type: Fin Box Material: PVC Optional Color: Green, Orange, White, Purple, Blue Size: Approx. 16 x 7 x 4cm or 6.3 x 2.8 x 1.6inch Weight: Approx. 82-85g Package List: 3 x Fin Box