Spaceman manufactures top-quality, state-of-the-art frozen beverage machines. These machines are ideal for frozen beverages, slush beverages, margaritas, smoothies, shakes, and frozen coffee drinks in school cafeterias, bars, restaurants, or burger joints. All Spaceman Frozen Beverage machines with "H" indicate standard hopper agitator. A hopper agitator periodically mixes the product that is being stored in the refrigerated hopper to keep it evenly cooled and to avoid ice buildup around hopper walls. Without the hopper agitator option, employees will have to manually stir the product every 30-60 minutes. Models without hopper agitator are 6210, 6220, and 6450.