ARO® lubrication pumps handle motor and gear oils, transmission fluid, and standard and industrial greases. Pumps are offered from 3:1 to 100:1 ratios in order to meet the requirements of any application - commercial vehicle servicing to lubricating heavy mining equipment. WARNING: These 100:1 pumps deliver pressures up to 10,000 psi and can only be used in permanently installed systems where the pump is connected directly to piping with the proper rating for the application. Specifications RATIO 11:1 Stroke 4” (40.2 cm) Material Outlet 1/2” NPT(F) Air Inlet (female) 1/2” NPT(F) Air Inlet Pressure Range psi (bar) 0 - 100 (0 - 6.9) Fluid Pressure Range psi (bar) 0 - 10,000 (0 - 690)) Max Delivery/Minute @ 75 cycles 5.2 lbs (2.35 kg) Noise Level @ 60 psi dBA 84.7 Material Inlet Immersed