This Action Pump THP-ST hand-operated piston drum pump is made of stainless steel for resistance to corrosion, delivers 22 oz. per stroke, and is suitable for dispensing corrosive chemicals such as MEK (methyl ethyl ketone), acetone, and toluol. It comes with a 2" bung adapter. This piston drum pump is suitable for use with 15, 30, and 55 gallon drums in a variety of industrial and commercial applications.SpecificationsPumpPiston drum pump, hand-operatedMaterialsStainless steelFlow rate22 oz. per strokeSuction port1.5"For use with15, 30 or 55 gallon drumsDimensionsOverall length: 41"Pumps use mechanical action to move liquids, gases, or slurries (solids suspended in a liquid or gas). The mechanical action is categorized as either positive displacement (PD) or kinetic. PD pumps capture and release discrete amounts of flow into a chamber and then force it out. Some examples of PD pumps are fuel and oil pumps in cars, pumps in hydraulic systems, and bicycle pumps. Kinetic pumps move liquids, gases, or slurries by transferring energy from the pump's movement to the flow. They use an impeller to draw the flow in, add energy to the flow, and move it through a volute (a spiral funnel through which the flow moves), and into the system. Some examples of kinetic pumps include centrifugal (the most common pump in industrial applications), in-line pumps, sump pumps, and suction pumps. Energy sources for all types of pumps include wind power, manual operation, electricity, and gasoline or diesel fuel.Action Pump manufactures drum and pail pumps and grease, oil, and lubrication products. The company, founded in 1981, is headquartered in Cary, IL.What's in the Box?THP-ST piston drum pumpSuction tube2" bung adapter