http://www.micromatic.com/draft-keg-beer-edu/beer-keg-jockey-box-cid-2637.html http://www.micromatic.com/draft-keg-beer-edu/about-jockey-boxes-aid-118.html What are they and how do they work? A jockey box draft beer system is also called a coil box or cold plate box. The name Jockey developed from the portability of the unit as it is easy to move from one location to another (jockey around). aid-118