Rockville Super Duty Dual 10" Ported Subwoofer Box Enclosure for 2000-16 Ford F250/350/450 2000-2016 Ford F250/350/450 Super Duty Dual 10" Ported Subwoofer Box Enclosure. Dual 10" Ported for Ford F250/350/450 Super Duty 2000-2016 Behind Seat, Removal of Jack Kit, Rear Seat Belt Cover & Rear Carpet is Required. Power Window motor needs to be removed during installation. Finished with Durable Bed Liner. F250/F350/F450/F550 Super Duty Crew Cab. Mounting Depth: 4.5 (inches). Mounting diameter (hole size): 9 (inches). Wood thickness: 5/8 (inch) Air space: 1.4 Cubic feet. Material: Highest-grade MDF wood on the market 2000-2016 Ford F250/350/450 Super Duty Dual 10&#034; Ported Subwoofer Box Enclosure Dual 10&#034; Ported for Ford F250/350/450 Super Duty 2000-2016 Behind Seat, Removal of Jack Kit, Rear Seat Belt Cover &amp; Rear Carpet is Required. Power Window motor needs to be removed during installation. Finished with Durable Bed Liner F250/F350/F450/F550 Super Duty Crew Cab Mounting Depth: 4.5 (inches) Mounting diameter (hole size): 9 (inches) Wood thickness: 5/8 (inch) Air space: 1.4 Cubic feet Material: Highest-grade MDF wood on the market