... ignition point in 2700'c Specification:Raw material: Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc ... to GB6566-2001 A-Class.Specifications:Raw material:Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc ... ,fireproof doors cornice baffle boards, public restroom dividers baseboards ,truck cabinets and billboards etc . Magnesium oxide board , Fireproof ...