DescriptionThe upper end of the fin shape, streamlined appearance design, sothat the surfboard flipper more in line with the principle of watersports, with better water and mobility. This nylon safe surfboard fincan increase the stability of the board and keep you safe while surfing.Features-Color:Black -Material:Plastic -Size:22.00X18.00X3.50cm/8.65X7.07X1.38in -Note:The Base is NOT included. -Made of plastic material, tough, wear-resistant, durable. Suitable for various kinds of inflatable surfboards.-Adjustable design of this surfboard fin is easy to install and use, and can meet your daily needs.-This paddle board fincan improve the the stability of surfboard to keep safety of you when surfing.-The surfboard fin will improve your board's tracking, meaning less stroke changes.-The surfboard fin is suitable for various kinds of inflatable surfboards, like longboard, surfboard, stand up paddle board.