These Metro security cages are constructed of heavy-gauge open-wire to ensure your contents are visible and easily managed. These cages utilize genuine Metro shelves and wire-grid panels to create a sturdy, cost-effective, and lockable storage unit. Optional adjustable wire shelves can be positioned at precise 1" increments along the length of the numbered posts. The open-wire design minimizes dust accumulation and allows for air circulation. Cages should be limited to 750 lbs. for over-the-road applications. Internal shelves are not included.