... : magnesium oxide, Polystyrene particles Surface materials: Magnesium board2. Specification: (L*W*T) 1200-3000mm X 610,915,1220mm ... and impact resistance Largest span and height thin webbed wall Most civilized, environmental, high efficiency construction.5. ... Key Specifications/Special Features:Wall thickness:30,50,75,100,150,200mmMaximum width: 1220mmLength ...