... :confirming to GB6566-2001 A-Class.Specifications:Raw material:Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc .Incombustible ... of sawing ,planning drilling ,nailing and cutting etc .Magnesium oxide board have been used primarily as fireproof materials for walls ... restroom dividers baseboards ,truck cabinets and billboards etc . Magnesium oxide board , Fireproof magnesium