The Crain double case design includes a head case with wheels and a tube case that hooks onto the head case for easy transport. The cases are easily split apart for carrying upstairs or loading back into the van. Both cases are durably constructed of double-wall high density blow-molded plastic and feature recessed latches and handles that won't break off. The custom-fit interior holds all of the included stretcher components. The tube case contains the Auto-Lok tube and 3 extension tubes and there is room for 2 extra extensions in the head case.