fireproof board,magnesium fireproof board,mgo fireproof board 1) 100% asbestos free 2) Non-combustible: PSB, GB8624, CLASS A fireproof board,magnesium fireproof board,mgo fireproof board1.Combustibility:Non-combustible A (GB 5464)2.Environment Friendly:Green/Rank A Building Material3.Length:2440 mm4.Width:1220 mm5.Thickness:3mm--12mm6.Weight:3.49--11.24 kg/m27.Density:0.95--1.25 g/cm38.Thermal ...