Exterior Rigid PUR Sandwich Panel The sandwich panel consists of 3 layers. Al-Zn steel sheet is embossed and used as the face sheet. Rigid polyurethane is used in the middle layer. So it performs well in heat insulation and coldness prevention. Ideal for container house, prefab house, concrete building wall cladding. Size: 3800*380*16mm ( The length can be customized) Container loading quantity :1300 m2 for 1*20GP 3300 mr for 1*40HC