Every DU-HA is custom designed to fit a particular model of truck. The DU-HA for the 06-07 Classic Chevrolet and GMC 5'8" Extra Short Box Extended Cab is designed to fit underneath your existing back seat. It's constructed from heavy duty polyethylene and comes with a lifetime warranty. This model also acts as a legal gun case in most states and will securely hold 2 rifles or shotguns, 1 with a scope. Scroll down for more photos and information on this DU-HA.