Fits 2004-2006 Toyota Tundra Double Cab Under seat Baffles - (not a whole box) Fits Over Storage Cavity Under Seat Hole cutout for 8" Sub: 7 1/8" Subwoofer Mounting Depth: 4.50" Mounting Depth based on 5.00" diameter magnet Made with 0.625" MDF Finish - Carpet Subwoofers & Amps Not Included Hole Cutouts adjustable per request Subwoofer Mounting depth based on the most common size subwoofers. Some Subwoofers with oversized framing/magnets may not fit without modification. If you're using a subwoofer that is close to the max specs please contact us for fitment confirmation.