Package includes: 4 x Surfboard Fin Stops Features - Dimensions: 4 x 1.5 x 0.5 cm / 1.57 x 0.51 x 0.51 x 0.2 inches. - Colour: black buckle for inflatable boat fin. - Material: Plastic Car Clip : This longboard fin stop features a practical and easy to use design, convenient to use for using the threading tool. : This central fin buckle is designed to ensure optimal compatibility with most surfboards, paddle boards, kayaks or long boards, being for all types of brands and sizes of boards with bumper cover fixing clips. - Well designed, easy to use and install and can meet your canoe fin catching needs. dinghy base - The surfboard fin retainer is made of plastic material, sturdy and durable surfboard fin fixing tool. - Surfboard fin latch uses glue to attach the base of the fin to the back end of the surfboard and connect the fin to the base surf fin fixing buckle. merchandise information dinghy fin buckle this paddle board fin retainer is made of quality plastic materials guaranteed to stand the test of time, playing an essential role when it comes to increasing stability, balancing steering maneuvers and traction.boat fin fixing buckle gives you a good sailing experience!