Buyers Products Black Steel Backpack Truck Box with Flat Floor features a rugged 14 Ga steel body and 12 Ga doors with built-in frame mounting rails that save time on installation. The box adds convenient and spacious storage behind the cab and is ideal for flatbeds, stake bodies, dump bodies, and utility bodies. The truck box is built with a rugged 14 Ga steel body and 12 Ga doors. Then it's powder-coated inside and out for exceptional corrosion resistance and style. A tough 1/4 in. pin, stainless steel continuous hinges, a rain channel, and watertight automotive bulb seal help keep weather and grime away from your tools. The locking, stainless steel latch provides a tight seal and helps deter theft. Installation is easy with built-in frame mounting rails.