... copper/brass sheet, preoxidized finish, with 12mm tempered Glass. Double leaf entry door(1) Material: 1.2mm copper/brass sheet outside ... UL lab and speciall requirement of structure and quality for Security Door(like bank,cashbox),using net-like and parallel ... multi-point lock,guard against theft, Doorsill:Copper sillPeephole:high definition peepholeHinge:special stainless steel hinge or copper hinges.( ...