Bbox A392-10CP Dual 10" Sealed Carpeted Subwoofer Enclosure - Fits 1999-2007 Ford F250/350/450 Crew Cab Cutout Diameter - 9.125" Max Mounting Depth - 4.5" Net Volume - 1.77" (Front Height) 17" x (Rear Height) 16" x (Width) 45.75" x (Depth) 8.25" x (2nd Depth) 3.5" Premium Charcoal Carpet Fits 19992008 Ford F250/F350 Crew Cabs MDF construction Completely carpeted enclosure with rounded edges .75-Inch speaker baffles Custom built for under seat application