8" Round Speaker Subwoofer Box Enclosure Slim Singles Speaker Box 7.25 Inside DiameterDimensions: 9" wide, 9" tall, 4. 25" deep Sleek design, will practically fit anywhere Mounting depth of 3. 75" Hole cutout of 7. 25" Airspace: 0. 11 cuft per box Airspace can be customized upon request Other hole sizes and mounting depth available upon request Boxes can be covered in Charcoal Gray carpet, black carpet or bare wood Boxes are glued and nailed This listing is for 1 piece or 2 pieces Have a custom design idea, we can build it Please