It is shockproof, soundproof, warmth preserved, anti-pry, anti-drill, elegant, smooth and silent for opening and closing Door Material: Quality cold-rolled steel sheet & stainless steel 1. Steel door with stainless steel doorsill 2. Cold-rolled steel door leaf and frame with heat transfer-printing, which looks natural wood grain(or powder coating). (steel sheet thickness available from0. 5mm~1mm ...