RT/OBCON - 2012 Chevy Silverado and GM Sierra 1500 Extended Cab Dual 10" Speaker Box With Labyrinth Power Port Designed for: 2012 Chevy Silverado 1500 and GM Sierra 1500 (DOES NOT FIT HD MODELS) 53" wide x 12" deep x 7" tall - Premium 5/8" MDF "Tri-lock" joint construction (caulked, glued, and stapled) Speaker mounting depth: 5 3/4" - Air Volume: 1.00cf Labyrinth slot vent design (downfire)