Scosche SE122CC 12-Inch Dual Subwoofer Enclosure (Grey/Black) " Medium density fiberboard front baffle and recessed side panels for easy lifting 100% Sealed joints with pre-cut 11" diameter hole Nickel plated spring loaded speaker terminals Pre-wired with fast-on terminals with poly fiber lining damper 2 x 1.25 cu. ft. internal volume