Jim Buoy's all new Sombrero Buoy is designed to be used where maximum stability and buoy strength are of prime importance. With the addition of the 2" wide aluminum protection band (optional) on the top edge of the jumbo flotation base, the Sombrero Buoy can withstand jet-skis and boat crashes that might otherwise permanently damage or tip over a standard buoy. In addition to positive, upright floatation, the large 12" high x 30" diameter base provides greater visibility because it naturally floats higher in the water! A galvanized external ballast may be ordered for some models - other ballast are internal, however (some weights may be necessary to add to the chains if a shallow condition exists). All colors are impregnated and molded into the tough CJ-37 Rock Hard outer shell for years of rugged maintenance free service. Eye bolts and metal components are galvanized steel for greater strength and resistance to rust and corrosion.