Best Steel Security Door ( M5-38 )Features: 1) Material: Cold-rolled steel A) Steel sheet of door leaf: 0.6 - 1.0mm B) Steel sheet of door frame: 1.2 - 1.5mm 2) Surface finishing: Heat-transfer 3) Filling material: Honeycomb (rock wool, polyurethane for optional) 4) Accessories: Hinges, locks, handles, viewer, doorbell, rubber seal,..