Made with hot-dip galvanized steel collars, Taylor Mades Mooring Collar protects your T3C buoy from anchor chain wear, prolonging the life of the buoy. Works in combination with standard shackles. Sized to slip into the top of 2 or 2.5 dia. tubes. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Boat/Dock Accessories.