Fits 6"<br> & 6.5"<br> speakers<br> 3-piece foam ring speaker enhancement system--gasket mounts speaker to baffle plate surface, middle ring mounts around outer edge of speaker & circular foam pad goes behind the speaker to absorb unwanted reflections on hard surfaces such as inside a car door<br> Reduces panel vibration <br> Increases mid-bass response <br> Enhanced audio output efficiency <br> Minimizes destructive wave interference <br> Helps prevent front & rear wave cancellation <br> Easy installation with peel & stick application <br> Maximizes performance for speaker installations<br> Pair<br>