... Surface materials: Magnesium board2. Specification: (L*W*T) 1200-3000mm X 610,915,1220mm X (30,50,75,100,150,200mm)3 ... .5. Key Specifications/Special Features:Wall thickness:30,50,75,100,150,200mmMaximum width: 1220mmLength: according to custom demands, engineering requirements ... of the brick buildingWaterproof and damp resistant,With fireproof feature Magnesium Oxide/MgO board,MgO sandwich panel