1.Fire proof: 67minutes 2.Weather proof 3.High density 4.High temperature withstanding capacity more than 1000 degree Specification: Magnesium sandwich ... Largest span and height thin webbed wall Most civilized, environmental, high efficiency construction.5. Key Specifications/Special Features:Wall thickness:30,50 ... the brick buildingWaterproof and damp resistant,With fireproof feature MGO Panels