Baratza Shut-off Hopper Built in bean stopper to allow hopper removal with beans in it Revision 1.2 is backward compatible to all Baratza conical burr grinders (Virtuoso and Preciso) On the conical burr grinders, the open/closed lever for the shut off faces the front of the grinder, becoming the adjustment marker. And the location of the lever will move as you adjust your grind If installing on a Forte or Vario you may also need a new upper burr carrier. Capacity: 300 grams/10 ounces. Accepts Baratza Hopper Extender