Buyers Products Diamond Tread Aluminum Underbody Truck Box w/Barn Door (18x18x48 Inch) Dimensions: 18"(H) x 18"(D) x 48"(W) Built tough with durable, corrosion-resistant, .100 in. thick diamond tread aluminum. Contents stay safe behind a side-hinged barn style door with continuous aluminum hidden hinge with solid 1/4 in. pin. Protect against weather and theft with 3-point locking, die cast compression latch system. Easy access to contents with double swing out doors (right or left handle mount) and no center post to get in the way.