Descriptive InformationOriginal Captions: Wheel assembly on collapsible litter; developed by Rangers Mathis and Delashmutt for back packing. Collapsible Wheel Litter; IV-Z-17259.Wheel assembly on collapsible litter; developed by Rangers Mathis and Delashmutt for back packing.Collapsible Wheel Litter, IV-Z-17259