The artwork consists of 200,000 stainless steel disks, each  in diameter and individually hung so they respond to air currents induced by train traffic. The work, along with others on the extension, was funded by a $1.5 million federal grant and other sources.
The artwork consists of 200,000 stainless steel disks, each measuring in diameter, that are suspended individually to react to air currents produced by train movement. The work, along with other projects on the extension, received funding from a $1.5 million federal grant and additional financial support.