The Kargo Master Pro II Series Truck Ladder Rack is one of the toughest heavy-duty racks in the market. The Kargo Master Pro II Series Truck Rack is built with 2" diameter round steel tubing that has a 1,700 lb. loading capacity. The sleek round tube design significantly reduces wind drag and noise and creates an uniform load distribution that results in a sturdier rack. All Kargo Master truck racks are treated with zinc primer and marine grade powder coat to achieve excellent corrosion and UV resistance.