1 MDF SPEAKER RING SPACER 15 INCH WOOD 3/4 THICK FIBERGLASS BOX ENCLOSURE PORT

2 MDF SPEAKER RING SPACER 5.25 INCH WOOD 3/4 THICK FIBERGLASS BOX RING-5.25R

1 MDF SPEAKER RING SPACER 8 INCH WOOD 3/4 THICK FIBERGLASS BOX ENCLOSE RING-8R

1 MDF SPEAKER RING SPACER 10 INCH WOOD 3/4 THICK FIBERGLASS BOX ENCLOSE RING-10R

Install Bay SR12 Single 12" x 3/4" MDF Speaker Ring for Subwoofer Installation

1 MDF SPEAKER RING SPACER 12 INCH WOOD 3/4 THICK FIBERGLASS BOX ENCLOSE RING-12R

Metra Install Bay SR12 High Quality MDF Speaker Rings 12X 3/4 Part & Accessory

MDF SPEAKER RING SPACER 10 INCH WOOD 3/4 THICK FIBERGLASS BOX ENCLOSE RING-10R