The Endurance large 20-quart stainless steel water bath canner features a tri-ply base for even heating and a tempered glass lid with built in steam vent. This set also include the 7-Jar Canning Rack. The canning rack holds 7 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. The canning rack is made from dishwasher safe 18/8 stainless steel with polyethylene coated handles.