Features:

• 2004-2006 GMC/Chevy Crew Cab Behind Seat Dual 12" Subwoofer Sub Box Enclosure
• 2hole 12" for GMC/Chevy 2004-2006 Non-HD Crew Cab
  
• Fits between Air Ducts Behind Seat, Remove Factory Jack, Fires Forward
  
• Premium Charcoal Colored Carpet
  
• 2004-2006 GMC/Chevy Crew Cab
  
• Air Space: 0.60 Cubic Feet (per sub)
• Mounting Depth: 5.5"
• Mounting diameter (hole size): 11" (inches)
• Wood thickness: 5/8" (inch)
• Material: Highest-grade MDF wood on the market