Bbox A142-10CP Dual 10" Sealed Carpeted Subwoofer Enclosure - Fits 2007 - 2014 Chevrolet / GMC Silverado / Sierra Extended Cab Cutout Diameter - 9.125" Max Mounting Depth - 6.5" Net Volume - 1.83" (Front Height) 6.875" x (Rear Height) 6.25" x (Width) 52.75" x (Depth) 11.875" x (2nd Depth) 14.25" Premium Charcoal Carpet Fits 2007 and Up GM Extended Cab MDF Construction Completely Carpeted Enclosure With Rounded Edges 0.75-inch Speaker Baffles Custom Built for Under Seat Application