Specification Nucleus material: Glass fiber Form: Square Material: Rubber Grade: A Flexion Resistance: Strong Compression Resistance: Strong Form: Fibrous Size: 200x50cm Thickness: 5mm Characteristics This product comes with a strong adhesive, at room temperature greater than 0 degrees without additional heating can be directly glued. The higher the exterior temperature of the dough, the more the solid construction cannot be removed after the dough is extremely strong! Noise experts recommend doing sound insulation at the same time, don't forget The door of the vibration, in the dough before the cotton sound could be posted before a few vibration plates are excellent, the general needs of the whole sedan with three cars of about 10 meters. Special remark: if Owners such as engine noise, you want to completely reduce engine noise alone on the hood on this cotton sound insulation point is not as simple as engine noise from the engine recommended to hood and noise effects U -Slot must use sound insulation in cotton aluminum leaf + aluminum plate hob butyl rubber shock paste (approximately 18-25), engine noise is a very complex sound engineering system, you must do Wings, firewall, dashboard in the shape of a slit sound insulation engineering! packaging included 1 x absorbent cotton roller