Fierce Audio 12" Inch Sealed Shallow Mount Subwoofer Wedge Style Enclosure for Trucks, Hatchbacks and Tight Spaces Ultra durable MDF material and double glued seamed construction for long lasting performance. Spring loaded, solid brass professional speaker cable terminal using pre-terminated soldered 16 AWG speaker cable for maximum power transfer. Two tone durable charcoal/black colored UV treated carpet for best protection against sun fading. Woofer mounting screws included. 0.75 cubic foot internal volume, 11.25" cutout for a 12" shallow mount subwoofer.