RKI Chest Box With Top Opening Lid 72x20x14 Black Diamond Tread Aluminum Model UST72ABRKI Chest Box With Top Opening Lid 72x20x14 Black Diamond Tread Aluminum Model UST72AB *Only intended to mount on a flat bed or chest style install* Hull of box is constructed of . 080 diamond treadplate aluminum. Welds are full arc welds, no spot welds. Box incorporates a 4 1 2 deep top opening compartment. Top opening compartment has adjustable divider slots on 2 centers. Lid is constructed of . 080 diamond treadplate aluminum with an inner