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, and have a sandblasted finish which allows the buoy to be easily painted for identifying Filled with EPS foam to positively displace water Tube-through-the-center design with blue reflective striping 3 inch tube diameter, 95 inch circumference, 460 lbs buoyancy Three year flotation warranty