Develops 10,000 PSI at 100 PSI air pressure. 3/8" NPTF oil port. 98 cu.in. usable oil capacity in plastic reservoir. Weight: 15 lbs., 3 oz.. With shop air as the energy source, these pumps have the power and oil capacity (80 cu. in. usable oil) to drive even the large 55-ton rams. They are ideal all-around power sources for dozens of body, frame, and alignment applications. Also can be used with a variety of rams, presses, and hydraulic pullers operating at up to 10,000 PSI. An internal relief valve protects the hydraulic components regardless of hydraulic pressure.