The four drawer file cabinet is constructed from heavy gauge steel with Gypsum insulation that is encased in a grid of 1" x 2" galvanized welded steel wire. It is water resistant 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 with your choice of color, Pewter shown. Quality backed by a limited lifetime warranty.