Package: (2) Hifonics BRX12D4 Brutus 12" Dual 4-Ohm 900 Watts Peak / 450 Watts RMS Car Subwoofers + Rockville RDV12 Dual 12&rdquo; 1.55 cu.ft. Vented Subwoofer Enclosure + Dual Enclosure Wire Kit With 14 Gauge Speaker Wire + Screws + Spade Terminals 12" Dual 4 ohm Brutus Series Car Subwoofer. DVC 4-Ohm 2.5 High-Temp Voice Coils. 12 Round Subwoofer. Rubber Surround . Dual Flat Nomex Spider With Woven Tinsel Leads. Polypropylene Cone. Nickel Plated Push & Insert Speaker Terminals. Double-Stack Magnet Assembly. Heat Dispersing Ported Nickel Plated Back Plate. Ultra Ridged Stamped Steel Basket. High Strength ABS Motor Cover. Operates In Sealed & Ported Enclosures. Black Chrome-Plated Gasket Dual 12" Vented Subwoofer Enclosure. 3/4" USA Heavy Duty MDF Construction. Machine precision cut mounting holes. Top of the line Glue for extra durable adhesion. High quality GOLD spring loaded terminals. Designed, tested, and engineered to work with most of todays popular woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system. Type of Enclosure: Vented. Enclosure Sub Size: Dual 12". Top and Bottom Depth: 17.75". Mounting Depth: up to 16" (enough depth for any sub on the market). Tuning Frequency: 41 Hz. Port Dimensions: 2.5" x 13" x 12". Gross Volume Per Sub (Measurement for the outer dimensions of the box): 2.1 Cubic Feet. Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood and port): 1.55 Cubic Feet 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal). 20 Feet of 14 AWG Blue Speaker Wire. 4 Spade Terminals