Material: aluminum fiber + muffler cotton Size 1: 50*200cm*3mm Size 2: 50*200cm*6mm Size 3: 50*200cm*10mm Package List 1*Car sound insulation pad It cannot be applied to heat sources such as exhaust pipes, mufflers or heat turbine pipes. 1Automobile fire-proof and heat-insulating pad, with strong heat insulation performance. 2 Suitable for most models. 3 Suitable for car doors, roofs, floors, hoods, firewalls, chassis, trunks, trunk covers, etc. 4 It has excellent sound absorption performance and good vibration resistance. 5 No powder, tasteless and safe to use. 6 Waterproof and dustproof, practical. 7 There is self-adhesive tape on the back for easy installation. 8 How to install: 9 First clean the surface where you want to paste. 10 Ensure that the insulation pad and the metal plate are firmly attached to achieve the best adhesion and damping performance. 11 Do not cover the wiring or air holes of the chassis during installation. 12 You can use tape to enhance the connection effect. 13 If the temperature is low, you can heat it with a hair dryer to make it soft, then tear off the wax paper and paste it.