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The Williams Hydraulics 5HD2S100 2 Speed Double Acting Hand Pump 128 has a usable oil capacity of 128 cubic inches. It also features a 4 way valve for operation of double acting cylinders. The Williams Hydraulics 5HD2S100 2 Speed Double Acting Hand Pump 128 has a large oil capacity to power a wide range of cylinders and tools. The two speed operation increases productivity and reduces user fatigue. It has a 1st stage pressure rating of 200 psi and a 2nd stage of 10,000 psi. It has an oil displacement of 0.81 cubic inches per stroke in the 1st stage and 0.14 cubic inches in the 2nd stage. The Williams Hydraulics 5HD2S100 2 Speed Double Acting Hand Pump 128 has a maximum operating force of 132 pounds and a piston stroke of 0.82 inch, with an oil outlet port of 3.8 inch to 18 NPTF.