Detailed Product Description 1.Characteristics Sound Insulation,Heat Insulation,Waterproof,Fireproof,,High strength and impact resistant,Mildewedproof,,Sanitation and cleanness, etc. 2.Materials MgO,MCL2 and other materials 3.Specification Width:1220mm Length:2440mm Thickness:20mm 30mm 50mm Other specification also available according to customer's request. 4.Use It can be used in Center air-conditioner.