The Metro TTS18NA Top-Track Overhead Track Shelving Track Set is designed to maximize your storage space. This overhead track shelving system allows for a more efficient use of space compared to traditional shelving. The movable aisle provides full access to the entire shelving unit, eliminating hard-to-reach areas. Ideal for laboratories and other environments needing high-density storage. Made from durable aluminum with a silver finish. Contact us for orders over $7,000 to see if you qualify for free shipping.