NTNEV 6.5" Car Door Foam Speaker Enhancer, Self Adhesive Speaker Fast Rings, Universal Bass Blocker Pad with High Rebound for Stereo Audio Speaker (4PCS-Black)

【High Quality Soundproof Cotton】Foam Speaker Enhancer Kit use high-quality foam material make sure the product is soft and elastic. High rebound, durable, crush resistant, waterproof. It weather-resistant and stable, not affected by high or low temperature, and stable sound insulation., 【Product Performance】The Foam Speaker Enhancer Kit prevent the sound quality from spreading, Absorbs the echo from the car door, Enhances the sound effect of the horn, and strengthens the sound effect. It can effectively prevent noise transmission, and the perforation design can effectively discharge the infiltrated water to ensure better sound quality., 【Product Parameter】The Foam Speaker Enhancer Kit outside diameter: 7.7inch/195mm, inner diameter: 5.7inch/145mm, height: 0.98inch/25mm, great for 6" 6.5" 6.75" 7" car door speaker., 【Easy to Use】The Foam Speaker Enhancer Kit come with strong sticky double-sided adhesive, no easy drop, easy to install. Just peel off the adhesive film, and stick it on your stereo audio speaker., 【Extensive Application】The Foam Speaker Enhancer Kit are perfect for the universal 6.5" speakers which are suitable for most automotive stereo audio speakers. After installation, you can enjoy 360-degree surround mid-bass in your car.