Black 8" 30-HZ Single Competition Ported Sub Box SPECIFICATIONS: -CUTOUT DIAMETER: 7 1/8" -AIR VOLUME: 0.98 FT^3 -TUNING FREQUENCY: 30-Hz -1 SLOT PORT (DIMENSIONS: H-9” W-1” L-25”) -WEIGHT: 33 LBS. -MOUNTING DEPTH: 12 1/2" -FRONT BAFFLE THICKNESS 1" DIMENSIONS: -HEIGHT: 10 1/4” -LENGTH: 20 3/4" -DEPTH: 15 3/4" CONSTRUCTION: -3/4" MDF WOOD -2" STAPLES -HIGH QUALITY WOOD GLUE + MAINLY SEALED WITH HIGH QUALITY SILICONE+ NOT ALL SUBS WILL FIT DUE TO THE CUTOUT DIAMETER AND MOUNTING DEPTH SO PLEASE CHECK THE DIMENSIONS TO MAKE SURE THIS BOX SUITS YOUR SUBS