Dual 12" Ported Vented Subwoofer Sub Box Enclosure For 14-15 GM/Chevy Crew Cab

Features: 2014-2015 GM/Chevy Crew Cab Dual 12" Ported Vented Subwoofer Sub Box Enclosure  2hole 12" Ported for GM/Chevy Crew Cab 2014-2016 Upfire Underseat Finished with Durable Bed Liner 2014-2015 GM/Chevy Crew Cab Mounting Depth: 5.5” (inches) Mounting diameter (hole size): 9” (inches) Wood thickness: 5/8” (inch) Air space: 0.9 Cubic feet Material: Highest-grade MDF wood on the market