... 1) Material cold-rolled steel 2) Thickness of the door leaf 5cm/7cm/9cm 3) Frame outer sizes (H ... , specialty multi-point lock, handles,peephole, hidden doorbell, rubber seal and magnetic seal, doorbell, installingbolts, stainless steel threshold ... soundproof, warmth preserved, anti-pry, anti-drill, moisture proof,guards against thefte) Environmentally friendlyf) Bright, lustrous and durable steel ...