Phoenix USA Ultimate Toolboxes are constructed of 13 gauge steel. 24″ x 18″ x18″ Steel Topside Mount Toolbox with Steel Rolled Door features water-resistantdoor gaskets and stainless steel latches. Toolboxes are constructed of 13 gauge steel All feature Water-Resistant Door Gaskets and Stainless Steel Hardware Steel Topside Mount w/ Steel Rolled Door High-gloss automotive powdercoat finish Outside Dimensions: 24″L x 18″D x 18″H Door opening: 19″L X 14″H 57 lbs.