Canon Multifunction Roll Unit RU-21 

For imagePROGRAF PRO-2000, Works with Rolls up to 24" Wide, Dual-Roll Feed or Bi-Directional Rewind. Enhance the functionality of your imagePROGRAF PRO-2000 printer with this RU-21 Multifunction Roll System from Canon. When installed this system allows users to load a second roll of media into the printer or set up a bi-directional take-up unit.