Structure : AL foil +bubble +AL foil AL foil +bubble + PE AL foil + bubble +bubble +AL foil AL foil + bubble + EPE + bubble + AL foil Multi-layer insulation material. Specifications : Length :according to customersdemand Max width :1.25m Diameter of bubble : 6mm, 10mm, 12mm, 20mm, 25mm. Features : Clean , lightweight , easy to cut , quick and easy to install , store, and handle , environment friendly. Usage : It is widely used as construction material, such as roofs, floors, animal barns, warehouses and ducts etc. Technical DATA: Thickness : 8mm Reflectivity : 97% R-value : 3.5 temperature range : -50 degrees C to 80 degrees C Security : Non-toxicity, non-corrosiveness Operation : It is easy to operate and can raise working efficiency. Pliability : No cracking. Durability : It will not degrade over time. Mold and mildew : No growth Linear shrinkage : None Fire rating : Class A/Class 1.