Used in SUP boards or surfboards. Superior Nylon plastic materials so that can bear water pressure and UV. 1pc per set. Length:9.0" Fin screw is included. No MOQ, sample and small order are available. We are a surf company that has been in the surf industry over 15 years in China. We have worked for several big brands for many years. We have own designer team and production team for surf products. We have a very professional and responsible sales team. Our main purpose is to provide high quality and affordable products to our customers. Our mission is find the best way to serve the surf product market.