Water Bath Canner w/Jar Rack holds up to 4 Qt. jars, 7 Pt. jars, or 8-half Pt. jars. Granite Ware's water-bath canners have been the standard for canning for over 100 years. The stepped design of our canners produces more even heat by allowing more boiling water contact with the top half of the jars. Used to elevate food temperature above 212-degrees Fahrenheit for 15 minutes or more, which kills all the bacteria found in high acid fruits and vegetables. The water-bath canner creates a vacuum se1PK GraniteWare 15.5 Qt. Water Bath Canner w/Jar Rack