Steel Structure Prefab Room 1.high bearing capacity 2.heat-proof quality 3.good fireproof performance 4.light-weight flexibl Steel Structure Prefab Room Insulation board1 MaterialWall panel sandwich board is made up of foam, polyurethane, and mineral wool, and the top board, back board are steel plate.2 FeaturesIt gathers Insulation, heat insulation, bearing, waterproof up, and has rich colors, ...