These mooring buoys are built to withstand the toughest mooring environments.With Taylor Made Traditional Sur-Moor Mooring Buoys, a shaft passes through the buoy's center, holding together top and bottom with galvanized steel rings.NOTE: Mooring pendant lines must never be tied to the top ring. Attach them to the anchor chain under the buoy.Key FeaturesPolyethylene shell and closed-cell foam coreHot-dipped galvanized steel ringsBlue stripe is reflective for nighttime visibility ModelDiameterCircumferenceBuoyancy*192927212"38"30lb.192920715"47"60lb.192738318"57"100lb.192719324"75"240lb.*Buoyancy rating: The number indicated is the maximum flotation the buoy provides while fully submerged. 50% of this value will be the weight the buoy can support at the level of the blue stripe.