Buyers Products Gloss Black Diamond Tread Aluminum Heavy-Duty Flatbed Contractor Truck Boxes optimize the storage space on your flatbed, stake bed, and service body trucks with its extra deep and tall dimensions. Measuring 21– tall and 18– deep, these truck boxes offer two tiers of storage for your tools and equipment while still leaving ample room in your truck bed for larger cargo. Constructed from durable 0.100 in. thick diamond tread aluminum to resist corrosion and wear, these boxes are built for the long haul. Offering accessible storage while out on the road, the upper cabinet has a reinforced shelf to store heavier equipment while the lower shelf stores the rest of your tools. The rugged and lightweight aluminum box is powder-coated gloss black for superior corrosion resistance and style. The external rain gutter and automotive bulb seal shield contents from moisture and grime, while the die-cast locking compression latches offer added protection from theft. Gas shocks ensure the upper flip-up door opens smoothly and stays open. Aircraft-grade cables protect the lower door and hinge from damage. Designed to mount flush on your bed or service body cabinet, no risers are needed for installation. The Buyers Products Flatbed Contractor Tool Boxes provide high-capacity storage while still leaving ample room in your truck bed for sheet goods and larger cargo.