Dispenses 8 ounce per stroke. Includes 2-5/8" pail adapter, 3/4" and 2 inch drum adapter. For use on 5-15-30- and 55 gallon drums. Adjustable stroke from 2, 4, 6, 8 ounce. Piston Drum Pump,Hand Operated, 2, 4, 6 & 8 oz. per stroke,Self Priming, 5, 6, 15, 30 & 55 gallon drum capacity, 5/8 inces OD/ 1/2 inches ID suction tube,4000SSU Viscosity Operation Range, Piston Polyethylene, Repairable Lip Seal, Overall Length 43.3 inches, 2 inches Polypropylene Bung Adapter included.