Buyers Products Stainless Steel Underbody Truck Box w/Polished Stainless Steel Door (18x18x24 Inch) Dimensions: 18"(H) x 18"(D) x 24"(W) Durable and corrosion-resistant, built with a durable 14 Ga stainless steel body and a 14 Ga stainless steel door. Attractive, polished stainless steel drop door. Shut out weather and theft with locking, die cast compression latch. Can be mounted on either a flat surface or under-bed.