Every DU-HA is custom designed to fit a particular model of truck.
The 03-15 Ford F-250 thru F-550 Super Duty Crew Cab model is designed to fit underneath your pre-existing back seat (fits models with 60/40 split bench seats only). 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 holds up to 2 rifles or shotguns without scopes securely using the included gun rack. Scroll down for more photos and information on this DU-HA.
If you would like additional storage for your truck, there is also a behind-the-seat model available. Both the underseat and the behind-the-seat model will fit at the same time.