... Free, green environment protection, water resistance,fireproofing,noiseproofing,stability Fireproof Magnesium Oxide Board DescriptionMagnesium oxide board Raw Materialsmagnesium oxide, magnesium chloride, perlite, fiber glass mesh, wood fibersStandard Size1220mm ... :High strengh5:Stable dimensions6:Durability and long service life ect Fireproof Magnesium Oxide Board