Feature●Rockville 12" Sub Box for 1999-2006 Chevy Silverado 1500 Xcab/99-06 GMC Sierra. Proudly Made In The USA, Using Only The Finest Quality Materials - For The Best Level of Performance From Your Subs!●5/8" USA Heavy Duty MDF Construction. Machine precision cut mounting holes . True Bed Liner Finish. High quality Screw down spring loaded terminals.●Designed, tested, and engineered to work with most of today’s popular woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system.●Enclosure Measurements: Type of Enclosure: Sealed. Enclosure Sub Size: Dual 12". Dimensions in Inches: 9.5" L x 51" W x 15.25 H". Mounting Depth: 5” (inches).●Mounting diameter (hole size): 11” (inches). Wood thickness: 5/8” (inch). Air Space: 0.95 Cubic Feet. Material: Highest-grade MDF wood on the market.Description