Rockwool sandwich panel: 1.Thickness of steel sheet:0.3-0.6mm 2.Color:various colors ... materialHigher fireproof rock wool6External sideColorful PPGI corrugated steel sheet7Internal sideFlat color steel sheet8Thickness of the steel sheet0.2mm-1.2mm9ColorRed,white,blue or ... Application:it is widly used as roofing material for steel structure plant, gym, Supermatet ,commercial and civilian facilities.