Bbox A102-10CP Dual 10" Sealed Carpeted Subwoofer Enclosure - Fits 1988-1998 Chevrolet/GMC Full Size Pickup Extended Cab Cutout Diameter - 9.125" Max Mounting Depth - 6.5" Net Volume - 2.31" (Front Height) 9" x (Rear Height) 5.75" x (Width) 53.75" x (Depth) 15.5" x (2nd Depth) 12.375" Premium Charcoal Carpet Fits 19881998 GM Extended Cab MDF Construction Completely Carpeted Enclosure With Rounded Edges 0.75-inch Speaker Baffles Custom Built for Under Seat Application