... confirming to GB6566-2001 A-Class.Specifications:Raw material:Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc ... treated in the way of sawing ,planning drilling ,nailing and cutting etc .Magnesium oxide board have been used ... ,fireproof doors cornice baffle boards, public restroom dividers baseboards ,truck cabinets and billboards etc . Magnesium oxide board , Fireproof ...