Q: Is this product of the same size as the image? I want to use it on the car, is there a gap? a: Yes, but due to different lots, his error is generally 1 ~ 5cm. If it is used on a car, it will not affect use. If you have any questions about use, you can ask our staff to help you solve the problem Function: Strong acoustic insulation and absorption performance, thermal insulation, damping and antisepsy is easily installed, adapts to all types of vehicles. Self-adhesive and waterproof, anti-dust support. striped resistant. The high -fitting fiber -fitting fabric is made of fiberglass. The block transmits sunlight, the engine, the heat of the cabin exhaust hose, reduces the energy consumption of air conditioning, saves fuel slow down the aging of the car paint. Due to the hot time, the front coverage before by the direct sun, high temperature inside and outside the engine, accelerated aging of the paint keeps heat in the cold in winter, keeps cold in heat in summer. In winter, the engine temperature is very high, but outside is very low during driving, which facilitates damaged car parts Description: Material: alumina fiber + silent cotton No powder and excellent resistance to vibrations Excellent acoustic absorption properties does not contribute to the corrosion of metals very clean, does not absorb odors, odorless sets Easily, adapts to all types of vehicles self-adhesive and waterproof support, anti-dust. Note: Do not apply directly to a heat source, including: exhaust pipes, silent or Hot turbo pipes Installation: Remove the door panels Install the screws in their original place, it will be easy to find them when you mount them, prevent the holes from being covered With roller tools, insulation materials and sheet metal will adapt firmly, and will play the best adhesive, the best amortization performance. Depending on the effect you want, choose a construction program, A single soundproof/depreciation plate or a single thermal and sound insulation cotton or both. You can also use on car roof floors, hood, firewall, chassis, chest room, trunk cover And so on. Do not cover the wiring of the chassis or the air holes.