Description: These fins are universal professional fins for kite surfing boards Made of high quality 40% nylon and 30% fiber glass- high strength and durable Comes with Pieces of washers for convenient mounting Needs 2 Pieces Screws (Diameter: 4mm; Thread Length: 9mm) for one fin (Not Included) Great accessories for kite surfer better and flexible board control Specification: Fin Size: 48x134mm/1.89 x 5.27 inch Distance for two holes of fin is 75mm Color: Black 2Pcs Fins Package Includes: 2 Pieces Kite Surfing Fins 4 Pieces Rubber Washers 4Pcs Fins Package Includes: 4 Pieces Kite Surfing Fins 8 Pieces Rubber Washers