Chart 11821007 Carbo-Mizer® 450 with Epoxy Coating - The Carbo-Mizer® Bulk CO2 System is available in either 300, 450, 550, 750 lb models as an affordable alternative to high pressure cylinders. These systems offer flow rates that meet the demands of high volume customers such as: fast food, convenience stores, restaurants and bars. Chart systems provide carbon dioxide across a diverse range of applications including: brewing, food freezing, concrete curing, vaccine storage, pH control of swimming pools and more.