Hard skin mooring buoys have a seamless and tough, one-piece polyethylene shell. Hard skin shells feature ultraviolet light absorbers for long-term life under the sun. Filled with EPS foam to positively displace water. Reflective blue stripe for nighttime visibility. Hot-dipped galvanized hardware. Three-Year Flotation warranty. Textured finish to enhance paint adhesion. Size 18" Buoyancy 100 lbs.