Specification:MaterialPVCLength24.5cmWidth11.5cmFit 9/11inch finFeatures:1. Suitable for: kayaking, canoeing, surfing, etc. 2. Plug-in type, easy to use. 3. Stick the base to the kayak and the fins can be caught in the base. 4. Will not fall off, increase the speed, experience the fun.Package includ..