OBCON Single 10" Small Sealed Competition Enclosure for Chevy/GMC Extended Cab 1988-2007 (.88 cf airspace) Fits Chevy and GMC extended cab 1988 - 2007 (no HD models) Holds a single 10" sub with .88 cf air space Plexiglas viewing window V-Block sound deadening interior sealant spray Silver screw down binding post