Dispenses 8 ounce per stroke. Includes 2-5/8" pail adapter, 3/4" and 2 inch drum adapeter. 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 inchesPolypropylene Bung Adapter included.