Description: - 4 Pieces universal professional fins for kite surfing boards - Made of high quality 40% nylon and 30% fiber glass- high strength and durable - Comes with 8 Pieces 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: - Size: 48x13.4mm/1.89 x 0.52 inch - Color: Black Package Includes: 4 Pieces Kite Surfing Fins 8 Pieces Rubber Washers