Leash Plug Adapter w/1.5 Diameter BallThe 1.5 diameter ball leash plug adapter will attach to most SUP/surfboards, as well as after-market plugs. With the simple twist of the base, quickly secure the plug adapter to the board. Add a RAM arm or fishing rod/tube holder to complete your custom SUP mount. High strength composite and stainless steel construction assures a long life of trouble free use in a wide variety of environments including marine and salt water. Material:High Strength Composite & Stainless Steel Ball Size1.5 Rubber Ball Size Note:The U in the part number reflects product packaged in poly bag.