Mobile Wire Spool RackHeavy Duty 5 Tier Shelf Cart 1200 lbs Capacity Industrial Storage Solution (Model MB478) Overview of Heavy Duty Shelf Carts The Heavy Duty 5 Tier Shelf Cart is designed for efficient storage and transport of tools, equipment, and industrial materials. With an open shelving structure, it allows quick visibility and access to contents, improving workflow efficiency in warehouses, factories, and workshops. Key Features of the Mobile Wire Spool Rack: All