This is one of our biggest UL listed 1 hour fire rating safes, with plenty of room to keep all of your valuables safe. It has solid steel construction, with dimensions of 23.625" (H) x 18.875" (W) x 18.875" (D). The thickness of the door to the safe measures 4”, and the locking bolts have a large 1” diameter. The body has an overall thickness of 3.5”, encloses fire resistant material, and has a 2 story impact rating (factory tested). Keep your most important items protected from theft and the effects of fire and heat with this sturdy MESA safe.