Size: L*W=40"x 24=100cm*60cm=6.46sqft L*W=40"x 40=100cm*100cm=10.76sqft L*W=60"x 40=152cm*100cm=16.36sqft L*W=79"x 20=200cm*50cm=10.76sqft L*W=79"x 40=200cm*100cm=21.53sqft L*W=118"x 40=300cm*100cm= 32.29sqft Point: Strong sound insulation and absorption performance,heat insulation, damping and antisepsis Easily installs,fit all kinds of vehicle type.Self sticking backing and Waterproof,dustproof. Scratch resistant. The surface high-fiber cloth is fiberglass. Heatproof.Block transmit sunlight, engine, exhaust pipe heat to the cab, reduce air conditioning energy consumption, saving fuel Slow down the car paint ageing.Because of hot weather, the front outer cover through the direct sun, high temperature inside and outside the engine, accelerated paint aging Keeps Heat In-Cold Out in the Winter, Keeps Cold in-Heat Out in the Summer.In the winter, the engine temperature is very high, but outside is very low when driving, which make car parts damaged easier Description: Material:Alumina fiber+ Muffler cotton No powder and Excellent vibration resistance Excellent sound absorption properties Will not contribute to metal corrosion Very clean, not absorb odors, odorless Easily installs,fit all kinds of vehicle type Self sticking backing and Waterproof,dustproof. Note: Not to be applied directly to heat source including: exhaust pipes, mufflers or hot turbo pipes Installation: Remove the door panels Install the screws back in original place, it will easy be found when you mount, avoiding holes be covered With roller tools will make insulation materials and sheet metal firm fit, and play best adhesive, damping performance According to the effect you want choose construction program,only single Soundproof/Damping Plate or single Heat and Noise Insulation Cotton or Both them. You can also use on car roof floors, hood , firewall, chassis, trunk room, trunk lid and so on..Do not cover the chassis wiring or air holes. Installation Notices: Please clean the surface you want to paste. Make insulation materials and sheet metal firm fit, and play best adhesive, damping performance Do not cover the chassis wiring or air holes when you installation Appropriate use of adhesive tape will strengthen connections effect Paste Aluminum Soundproof/Damping Plate,you could heat with a hair dryer to make it soft, then compacted by hand. If the room temperature is below 5 degrees Celsius, first with sun lamp heating it until soft. Then remove the wax paper and paste it A successful installation process is best not to repeat tear paste, paste effect won't be damaged The extra insulation can be pasted in some hidden place It is not possible that there is an effect on the hearing by only a door installation ,it requires completed construction Perfect for door, roof,floors,hood, firewall, chassis,trunk room, trunk lid and so on.