Every DU-HA is custom designed to fit a particular model of truck. The Ford F-250 thru F-550 Super Duty Supercab model is designed to fit underneath your pre-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 hold up to 2 rifles or shotguns without scopes in the upright position. Scroll down for more photos and information on this DU-HA.