Transport Drum Head Type Closed Head Volume Capacity 55 gal. Material Carbon Steel UN Rating Liquid 1A1/Y1.2/200 Packing Group Hazardous Material Gauge 20/20/20 Color Black with White Cover Inside Dia 22-1/2 In. Overall Height 35-1/4 In. Outside Dia 23 In. Material Thickness 0.9/0.9/0.9mm Bung Hole Dia 2 in NPT x 3/4 in Fittings Interior Coating Rust Inhibitor Gasket Material EPDM Weight 37 lb. Standards DOT 49 CFR 173.3