•3/16" Steel Plate door with 2 layers of fire insulating material. •Mercury Class I fire protection of 1200°F for 30 minutes. Designed to maintain an interior temperature of less than 350°F. •2 Stage Dual fire seals with silicone seal on door jamb and Palusol™ seal on door. •Body constructed of 12-gauge (5924 - 14ga) solid steel plate with a fire insulating material. •Group II, key-changeable lock with spy-proof dial, internal relocker and drill resistant hardplate. •Optional electronic lock available. •3-point chrome tri-spoke handle and bold zinc die-cast polished chrome logo. •4-way boltwork with 5 active 1¼" chrome-plated bolts and 3 deadbolts. •Adjustable ball bearing hinges. •Textured Black exterior and Mocha fabric interior including back-cover and firewalls. •Four (4) pre-cut anchor holes with mounting hardware included and one (1) pre-cut electrical access hole. •Optional 4-shelf kit available.