Transport Drum Head Type Closed Head Volume Capacity 55 gal. Material Type 304 Stainless Steel UN Rating Solid 1A1/X2.0/600 UN Rating Liquid 1A1/X2.0/600 Gauge 16 Color Silver Inside Dia 22-1/2 In. Overall Height 35 In. Outside Dia 25 In. Material Thickness 1.5mm Bung Hole Dia 2 in NPT x 3/4 in Fittings Gasket Material Viton Weight 83 lb. Standards DOT 49 CFR 173