A. This car audio modification pad is designed for car audio upgrades and can meet the audio modification needs of different users. B. It is made of waterproof plastic materials. Whether it is a hollow pad or a solid pad, the quality is good. This material design can not only effectively prevent water and protect car audio equipment from moisture, prolonging the service life of the audio, but also ensure stable use in complex in - car environments. C. In car audio modification, it can be used as a speaker gasket to help the speaker be better installed and fixed, making the audio installation more stable, thereby improving the sound quality of the audio and creating an immersive in - car music experience for you. Whether you are an audio enthusiast pursuing better music effects or an ordinary car owner who wants to improve the car audio effect, this car audio modification pad is a good choice. D. It is widely applicable to regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and it has an authorized self - owned brand, with reliable quality.