ATREND ENCLOSURES 10 Dual Down-Firing Subwoofer Enclosure - 2001-Up Ford F250/350 Extended Cab A38210BK Dual 10" Down Firing Subwoofer Enclosure Designed specifically for 2001-2008 Ford F250/F350 Extended Cab Trucks Coated Tough Guard Finish Glued & Braced 3/4" MDF Construction Rounded Edges