Check the listing for details. 9'' SUP Fin 2 Pack Inflatable Paddle Board Fins, Quick Release Slide in Detac.... Color: 2 pack slide-in fin, Condition: New. Listed at 25.66 USD. Slide in, detachable center sup surfboard fin no screws needed. Strong & Durable: The sup fin made of plastic and fiberglass-reinforced nylon, which is strong, durable and solid to use. This 9" isup fin works well for all ability levels. Give you greater stability, and better control of direction and speed. Widely Compatible: The 9 inch sup fin works on inflatable paddle boards with the Slide In fin system. Be sure to measure and check the size before purchasing. It is compatible with most brands and models. Excellent fin for stand-up paddle board. Easy to Install and Remove: The fin is easily slide and removed with the quick-release pin. For some tight fin box, it may require extra strength to push or even knock it in. Simply insert the fin and secure the pin to install. Screws and no tools are needed. Lightweight: Depth: 9", base: 7". Make sure the rope is fastenand the pin is locked, before going into the water. : We know what we're doing and we stand by our products. If you're not satisfied with our product, we offer a 1-year and will replace or for you.