BLACK 12" DUAL SEALED TW3 SUB BOX, FITS CHEVY SILVERADO & SIERRA REGULAR-CAB 2007-2021 SPECIFICATIONS: -CUTOUT DIAMETER: 11 5/8" -TOTAL AIR VOLUME: 1.42 CUBIC FT. -2 INDIVIDUAL CHAMBERS -VOLUME PER SUBWOOFER: 0.71 CUBIC FT. -WEIGHT: 42 LBS. -MOUNTING DEPTH: 6 3/4" DIMENSIONS: -HEIGHT: 13 3/4” -LENGTH: 53 1/4" -TOP DEPTH: 5" -BOTTOM DEPTH: 9" CONSTRUCTION: -5/8" MDF WOOD -GLUE -STAPLES + MAINLY SEALED WITH HIGH QUALITY SILICONE + INSTALLATION: -FITS BEHIND SEAT -FORWARD FIRING -NO NEED TO REMOVE CENTER CONSOLE DURING INSTALLATION NOT ALL SUBS WILL FIT DUE TO THE CUTOUT DIAMETER OR MOUNTING DEPTH SO PLEASE CHECK THE DIMENSIONS TO MAKE SURE THIS BOX SUITS YOUR SUBS