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 80-quart heavy-duty aluminum stock pots. Constructed of heavy 13-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 18-1/2-inch. Measures 20-1/2-inch diameter.