son and mother steel door 1.damp proof, heat insulation,sound ... doorA .specification1Material Cold-rolled steel sheet for door leaf and frame with heat transfer-printing or ... available from 0.6mm~1mm for door panel; 1.2mm~2.0mm for door frame)Infilling: Honeycomb material or ... PU foam2Sizeheight:1970mm or 2050mm, width:1200--1400mm, Door ...