R/T 300 318-15 Enclosure Series - Single 15-Inch Slot Vented Sub Bass Hatchback Speaker Box with Labyrinth Power Port Made in the USA with premium 3/4" MDF 3.2 Cu. Ft. Air Space/Tuning - 32 Hz Easy Hook Up Terminal Cups Automotive Grey Carpeting 24" W x 17.5" H x 19.5" D