Store more in less space with this versatile METRO HD Qwik-Track High-Density Track Shelving. Mobile shelving slides between two stationary units allowing easy access to all sides. Aluminum track includes 1/4" tube that accepts the 3-3/4"H casters. Super Erecta® shelves adjust in 1" increments. System includes two stationary shelving units, specified number of mobile units, track sets, and connection hardware. Track should be anchored to the floor (anchors not included). Ships unassembled.