MODEL NO. 6404-LTL is a rugged heavy-duty D.O.T. compliant delivery cart designed to hold up to 40 D or E, cylinders while in transport or storage. Constructed with a high quality heavy-gauge angle iron steel frame, this unit was tested and load rated using heavier steel cylinders rather than light weight aluminum cylinders. Other feature include 2 removable handles, for shipping and storage purposes, and large 6″ heavy-duty plate casters (4 locking swivel – 2 rigid) that can be easily s removed for repair, maintenance or replacement.