Mobile Dunnage-Rack provides heavy-duty stability and durability for the storage of large bulk items. Made of high-density polyethylene (HDPE), Mobile Dunnage-Rack features easy no-tool assembly. It will not rust, is chemically resistant, and is ideal for HAZMAT storage. The shelf is 2-5/8" thick with a solid top that is perfect for heavier items. It is raised on 4" casters making it easy to move bulk items.