The locking fireproof file cabinet is constructed from heavy-duty steel and it has Gypsum insulation that is reinforced by a 1" x 2" lattice made of 14-gauge galvanized welded steel. It's made in the USA and has a 1-hour class 350 fire rating, 30 ft. UL impact rating, and a 30 minute ETL fire rating for digital media. It's available in different sizes, colors, and it's backed by a limited lifetime warranty.