Sur Moor T3C buoys are hard skin mooring buoys which 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 2lb. Density closed-cell foam to positively displace water. Choose between hot-dipped galvanized eyebolt and swivel or tube-through-the-center design. Sizes available 12", 15" 18", 24", 30".