Superb Decoration Effect *Thermal Insulation & Energy-saving *Easy Installation & Cost Reduction *Reliable & Long-lasti Siding CompositionTenghui Siding consists of three layers: the top material is special aluminum-zinc coated metal board, the core material is rigid high-density Polyurethane foaming with fire-retardant treatment, and the back material is fiber foil paper.Product FeaturesSince ...