Composition:The materials of paper magnesium fireproof board are Mgo, Mgcl2 and non woven fiber. Paper laminates on both surfaces. It is much lighter and better moisture resistant than traditional Magnesium Fireproof Board.Specifications:1) Sizes: 2440x1220mm.2) Thickness: 4 - 12mm.3) Other specifications available4) 100% asbestos freePacking: Standard export packagingPreservation:The Paper magnesium fireproof board can resist to the vile weather. In order to keep dryness in use, please preserve inside room, keep floor level and place wood board under it.