Polyurethane Sandwish Panel / RAL international colors / factory bulk supply / short lead time / factory-port directly shipping / custom service / 16mm 18mm 20mm 25mm 50mm types available. The surface material is galvanized steel plate, the middle layer is a polyurethane sandwich layer, B2 grade fireproof, and the back material is aluminum foil cloth. The metal surface is treated with anti-rust and anti-corrosion, which is environmentally friendly, pollution-free, and tasteless. Light weight, convenient transportion and easy installation. Total Thickness 16mm/18mm/20mm/25mm/50mm Surface material galvanized steel plate-0.25mm / 0.27mm Mid content material polyurethane sandwich foam Back material aluminum foil cloth Standard sizes L3800*W380*H16mm / L149.6*W14.96*H0.63in Packing Cartoon Origin port Qingdao,CN Package quantity 8pcs / cartoon Color International standard RAL colors Custom service yes Installation accessories yes Shipping arrangment yes Install guide yes Factory visit yes