Fireking Insulated two-drawer vertical file Insulated Two-Drawer Vertical File, 25" Deep, Legal Size, Parchment FireKing® files carry Underwriters’ Laboratories Class 350—one- or two-hour ”Record Protection Equipment classified as to Fire and Impact Resistance.” During testing, files are subjected to temperatures of 1,700° F for one or two hours and impact-rated to Insulation between drawers makes each drawer a separate, fireproof unit. Water-resistant—designed to prevent water damage resulting from sprinklers and fire hoses. Drill- and pick-resistant, UL Listed high-security key lock. Manufacturer`s lifetime warranty on all parts.