65 Inch Universal Car Speaker Ring Soundproof Cotton Auto Door Foam Pad Woofer Speaker Noise Insulation Ring Accessories Description: Sound insulation sealed speaker to obtain better sound performance. Absorb the back waves, prevent the front and back waves from counteracting, and reduce the panel vibration. In order to prevent the spread of sound quality, absorb the echo of the door, enhance the sound effect of the horn, enhance the sound effect in the car and seal the vibration. Features: 1. foam material, light and durable. 2. Sound insulation and sealing speaker to obtain better sound performance. 3. Absorb the back wave, prevent the front and back wave from canceling, and reduce the panel vibration. 4. In order to prevent the spread of sound quality, absorb the echo of the door, enhance the sound effect of the horn, enhance the sound effect in the car and seal the vibration. Product specification: Product name: speaker soundproof ring. Color: Black. Material: Foam. 6.5 inch size: inner diameter: 14.5cm outer diameter: 19.5cm Package contains: Gasket X4 _x000D_