... SpecificationThickness: 6mm,8mm,9mm,10mm,12mmSize:1200×1200mm,1220×2440mmColor:White and GreyNote:other sizes can be ordered according to customers ... installUsage:Used primarily as fireproof materials for walls and ceilings in office buildings, apartment complexes, residential constructions, hotels, restaurants, railway ... .711formaldehyde emission (mg/L)------<0.1 magnesium oxide board,made in China