BENLIUDH Car Door Speaker Fast Rings Foam Bass Blockers, Universal

Outside diameter: 7.68 inches; inside diameter: 5.71 inches; height: 1 inches. Specially designed foam for car door speakers. • Universal foam speakers gasket ring: ring kit for 6" and 6.5" speakers, These are foam so they're over/under sized, you can stretch or cut to fit. • The package includes: 2 loudspeaker soundproof rings, This kit is for 2 speakers, you would need to buy 2 packs for 4 speakers. • High purity EPDM is adopted to effectively prevent noise transmission, and the perforation design can effectively discharge the infiltrated water, acoustically sealed loudspeakers for better sound quality. • After installation: you can enjoy 360-degree surrounding mid-bass in your car, The bass doesn't get muffled. Bass feels better because this foam works as a chamber for the speakers, enhancing the feel, while reducing the vibration since sound is no longer directory bouncing of the metal frame. Absorbs rear Wave, prevents front and rear Wave cancellation and reduces panel vibrations.