Quantum’s new Overhead Track wire shelving system provides maximum storage using a minimum of space. All kits include the necessary sections of track for assembling lengths that range from 8’ to 21’ (note: shelves and posts sold separately). Assembly is quick and easy and the whole system requires only single-aisle access. Casters are 5” x 1-1/4” rigid polyurethane. Overhead track design provides a clear walkway and clear aisles underneath eliminating any tripping hazard. Overhead track extrusion manufactured of heavy-duty aluminum ensuring years of heavy-duty and reliable service.