This stock pots can cook nearly anything inside its wide base and high walls. Their aluminum stock pot cover is the perfect complement to their 100-quart aluminum stock pots. Constructed of heavy-gauge, reinforced aluminum and specifically designed for high-volume use, 2-mm thickness, this NSF-listed stock pot cover will perform wonderfully even under the most grueling of kitchen conditions. Inside diameter is 19-3/4-inch. Measures 21-5/8-inch diameter.