Taylor Made Products 46818 Sur-Moor T3C Boat Mooring Shackle Nest Buoy, 18 Inch Diameter Rope nest design has a built in cup shape at the top of the buoy that allows the anchor shackle to nest below the buoy surface Hard-skin polyethylene shell is UV protected to resist the weathering effects of sunlight and is foam filled to positively displace water Hard skin shell now has a sandblasted finish which allows the buoy to be easily painted for identifying 2-1/2" Tube-Through-The- Center design with blue reflective striping, hardware not included Three year flotation warranty, 100 lbs buoyancy