This 20-quart Water Bath Canner Set features a tri-ply base for even heating and a tempered glass lid with built-in steam vent. The set includes a 7-Jar Canning Rack that holds quart or pint jars in the proper position for optimum hot water circulation. The rack's design allows it to be raised and supported on the edge of the canning pot for easier jar removal. Dishwasher safe.