Fits 5”x7” & 6”x8” speakers, sold in pairs. Create a tight and secure seal around your speakers. Soft silicone reduces panel-to-frame and door panel reverberation. Foldable front rings guide the sound wave into vehicle cabin. Increase mid-bass response and enhance audio output efficiency. Egg foam captures the back wave reflections. Offers dropping water protection to the speakers The bottom half can be folded twice or trimmed