Material structure AL/ bubble+ bubble/ AL Bubble diameter and height 10mm* 2.5mm, 10mm* 4 mm, 20mm * 7 mm Size/ roll Normal size: 1.2m* 40m. Max width is 1.6m, length can be customized Reflectivity 96% -97% Water Vapor Transmission 0.012G/ M2KPA Thermal conductivity 0.032 Apparent density 54.8KG/ M2 Weight 385G/ M2 Tensile strength( MD) 13.43Mpa Tensile strength( TD) 14.58Mpa Corrosion Doesn’ t generate " Function: " Can be installed on roof, wall or floor, resist over 80% external heat from buildings, protect wall, resist thermal shock and sudden cold, etc.