This Action Pump R490-S hand-operated lever drum pump is made of Ryton (PPS, polyphenylene sulfide) for resistance to chemicals, delivers adjustable amounts of 8, 10, or 12 oz. per stroke, and is suitable for dispensing a range of chemicals. It comes with 1-1/2" and 2" National Pipe Taper (NPT) threaded bung adapters. 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-operated, lever-actionMaterialsRyton, polypropylene, PVDF, steelFlow rate8, 10, or 12 oz. per strokeDischarge spout0.9"Maximum temperature140 degrees FFor use with15, 30 or 55 gallon drumsWeight4 lb.DimensionsOverall length: 50"; Suction tube: 36" 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?R490-S drum pump36" suction tube1-1/2" NPT bung adapter2" NPT bung adapter