Specification Core Material: Fiberglass Shape: Square Material: Rubber Grade: A Bending Strength: Strong Compressive Strength: Strong Shape: Fibrous Size : 200x50cm/1x2m Thickness: 3mm/6mm/10mm Weight: 0.4kg Features: 1.  This product comes with a strong adhesive, at room temperature above 0 degrees without additional heating can be directly pasted. The higher the outside temperature, solid construction can not be removed once the paste is extremely strong. 2. Noise experts recommend doing sound insulation at the same time, remember the vibration door, in the paste before the sound of cotton can be displayed before a few vibrating plates are excellent. In fact, the general needs of the three-sedan car about 10 meters. 3. Special Note: If the owners like the engine noise, want to completely reduce the engine noise only on the hood at this point, sound insulation cotton is not as simple as the recommended engine noise cotton to create noise effects. of the hood and U-slot is necessary to use aluminum foil sound insulation cotton plate + aluminum butyl rubber shock plate (18-25 or so), engine noise is a very complex sound engineering system, it is necessary to make fenders, firewalls, dashboard U-shaped groove sound insulation engineering! Attention Please do not make mistakes when burning for a long time and take the gas stove to burn, because cotton with a sticker does not trigger the other car can not reach the fire conditions once the fire Conditions in addition to the metal parts inside the car may ignite all items, the proposed owners do not have privately installed electronic devices, the proper use of cars. Package Included 1 x Absorbent Cotton Roll