The surfboard fins are made of high-quality nylon material, which is tough, wear-resistant and durable. Removable Center Fin: Our center fin has a clip for attaching/detaching to the fin dock The sliding and locking fin box system makes it a removablecenter fin for inflatable paddles. HIGH PERFORMANCE: The surfboard fins increase the stability of the surfboard, keeping you safe while surfing. Detachable and adjustable design is easy to install and use to meet your various needs. Wide range of applications: Surfboard fins are suitable for all kinds of inflatable surfboards, such as longboards/surfboards/stand-up paddleboards. Description: The surfboard fins are high strength and durable, with excellent spin and guide properties for good balance while surfing and paddling. It is suitable for all kinds of inflatable surfboards, such as longboards/surfboards/stand-up paddleboards.Specifications: Item Type: Surfboard Fin Material: Nylon Color: Black Base Size: Approx. 11.5 * 24.5 cm / 4.53 x 9.64 inches Fin Size: Approx. 3.5 x 18.5 x 21.5 cm / 1.38 x 7.28 x 8.46 inches Weight: 300g Package includes: 1 * surfboard fins 1 * finbase