Check the listing for details. 15.7IN x 10FT Reflective Bubble Insulation Sheet Double Aluminum Foil. Condition: New. Listed at 60.60 USD. Length 10ft(3meter), Width 15.7inch(0.4meter), Thickness 6mmEnergy SavingReflective aluminum foil is composed of upper and lower aluminum foil and a single layer of polyethylene bubbles in the middle. The surface aluminum film can directly reflect rays and heat, and the bottom aluminum blocks residual heat. It has double-layer protection and a better heat insulation effect. It can be insulated cold air to create a hot winter and block heat to create cooler summers, thus saving your electricity bill.More Than 80% Thermal InsulationDouble-layer bubble reflective film has a thermal insulation effect of more than 80%, and a thermal conductivity of 0.032-0.036W/m.K. After using this insulation film in winter, the indoor temperature can be 5-8 degrees higher than the outdoor temperature, effectively keeping warm.