Description: Material: alumina fiber + cotton silencer Self sticking support and waterproof, dustproof. Note: it must not be applied directly to the heat source including: exhaust pipes, mufflers or hot turbo pipes Installation: Removing door panels Install the screws back in the original place, it will be easy to be found when you assemble, avoiding holes being covered With roller tools will make insulation materials and sheet metal firmly fit, and play better adhesive, cushioning performance You can also use it on car roof floors, hood, firewall, chassis, trunk room, trunk cover and so on .. Do not cover chassis wiring or air holes. Installation warnings: Please clean the surface you want to stick. Make the insulation materials and the sheet metal firm fit, and play the best adhesive, cushioning performance Do not cover chassis wiring or air holes when you install Proper use of adhesive tape will strengthen the effect of connections Paste soundproofing / dampening aluminum plate, you could heat it up with a hair dryer to make it soft, then compacted by hand. If the ambient temperature is below 5 degrees Celsius, first with the sun lamp heating it until it is soft. Then, remove the wax paper and glue it A successful installation process is best not to repeat the rip paste, the pastes effect will not be damaged Perfect for door, roof, floors, hood, firewall, chassis, trunk room, trunk cover and so on. Size L * w = 50x50cm/20x20 L * w = 50x100cm/20x39Product Set: 1 * acoustic cotton Dear buyer,Welcome to our store. if you want buy more than we listed, .If you need more this item ,you can .we will give you our best price. Leave your message!