Feature●Features: 2009-17 Ford F150 Super Crew+2017 F250/350 Super Duty Dual 12" Subwoofer Enclosure●RockvilIe REC104. Underseat Downfire. Finished with Durable Bed Liner●2009-2017 Ford F150 Super Crew or 2017 Ford F250/F350 Super Duty●Air Space: 1.0 Cubic Feet (per sub). Mounting Depth:5.875". Tuning Frequency: 36HZDescription