This Multiuse canner includes a Heavy duty canner, a jar rack, and a glass lid with Temperature indicator knob. The canner features a 2x layer porcelain surface with a durable steel core that provides excellent heat distribution. 21-Quart Water Bath Canner with thermometer glass lid - Multiuse as Stock Pot. Durable 2x layer enamel-on-steel construction heats quickly and efficiently. Side sturdy loop handles help ensure safe, secure transport. Safe to use on ALL stovetops, including Induction. Chromed Steel Jar Rack - Makes lifting jars out easy and is collapsible to save space. Holds up to 7-quart jars, 9-pint jars, or 12 one-half pint jars. Temperature indicator Knob - Helps monitor the canning process with precision based on temperature. Glass lid - See-trough lid to monitor your canning process closely. Not recommended for use on the oven. The porcelain surface is naturally non-stick and will not alter the color, taste or nutritional value of your food. There is no PTFE, PFOA or other unhealthy chemical in our products. 2x Enameled Steel resists up to 932F, which allow you to use it widely indoor and outdoor. It is oven-safe, can be used in most stoves and placed directly on fire. Enamelware is resistant to scratches caused by washing fibers and steel utensils, providing shine and durability to your pieces for a long time.