... the unique waterproof, fireproof , corrosion proof and plasticity are better than normally used wooden board, paper surface plaster board(gypsum board ... in commercial building, industrial building, residential housing, public place and so on.Specifications:Thickness :3-20mmMax width:1220mmMax length:3000mmEdges: square ... Magnesium oxide board for ceiling , fireproof door , partition wall, and so on