These are heavy-duty cabinets made of durable, rotation-molded polyethylene with the maximum UV protection. They are equipped with automotive style door gaskets that will keep out dirt, dust, water, and chemicals for years of trouble free service. Hinges and latches are made of reliable nylon. Some models are available with alarms and/or locks. Built for many years of trouble free protection. All cabinets have yellow doors on black boxes.