OBCON Dual 10" Chevy 2500/3500 Crew '00-'06 Speaker Box (behind the seat) With Labyrinth Power Port Fits '00-'06 Chevy 2500/3500 Silverado/Sierra Crew Cab '00-'06 (behind the seat) Holds 2 x 10 subs at 5 3/4" mounting depth Labyrinth slot vent design Premium MDF - "Tri-lock" joint construction (DOES NOT FIT HD MODELS)