Protect warehouse racking from damage from forklifts, pallet jacks and other equipment. Heavy-duty magnet holds unit securely in place, no hardware required for installation. Polyethylene construction is maintenance free, no painting or upkeep required. Safety yellow color with contrasting black warning stripes provides excellent visual reference for drivers and other warehouse personnel. Measuring 5-3/8" x 3 1/4" x 15-1/2" and weighs 7lbs, 4" Usable Opening Size.