4Pcs Universal 6.5" Car Speaker Sound Insulation Ring Cotton Bass Door Trim Soundproof Foam Auto Interior Accessories

​Main Features: Soundproof sealed speakers for better sound performance. Absorb back waves, prevent front and rear waves from canceling each other out, and reduce panel vibration. In order to prevent the propagation of sound quality, absorb the echo of the car door, enhance the sound effect of the horn, enhance the sound effect inside the car, and seal the vibration. Specifications: Material: Foam Color:Black Size: 6.5 inch Package Includes: 4Pcs x Insulation Ring Note: Please allow 1-3cm differences due to manual measurement. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you! No Retail Box,Packing Safely in Bubble Bag.