1x4x20 Float Drum - 336# Buoyancy

Insul-Bead's encapsulated flotation design offers maximum buoyancy and engineering integrity. This is accomplished by keeping our corners square and our side taper, with reinforcement gussets to a minimum. This superior design offers strong corners and allows a straight corner line from the top of the dock to the water. • 15 Year Prorated Warranty • Heavy Wall thickness .150" • Heavy mounting flanges • Square-reinforced corners • Foam filled 1.0-1.5 lb density • Resists saltwater, oil, gasoline,and marine life • Fits new or old wood, steel or aluminum frames • Roto-molded polyethylene shell • Shell made with UV inhibitors • Meets "Hunt" Water Absorption Test • Meets Army Corps of Engineers standard • Fits Removable and Permanent Docks • Earth Friendly Manufacturing