The Grainger Approved Open Head Drum is a 55 gallon open head steel drum with a rolled rim and 2 inch NPT bung openings. It is constructed of 18 gauge steel with a galvanized finish and has a capacity of 55 gallons. The dimensions are 23 inches diameter by 35 inches high. It can be used for storing and transporting liquids or powders. This drum meets UN and DOT specifications.