This Lubeworks Preset Digital Control Valve has a Max Flow rate of 21GPM / 80LPM, at a precision of ±0.5%, handling Viscosity of 8-5000mPas, w/ a Max Pressure Range of 7Mpa 0.5-50BAR / 7-1000PSI. An Inlet Connection of 1/2" NPT Female connecting to industry standard oil hose reels & battery powered w/ 1x Alkaline Cell 9v Battery, all together weighing 2.8 lbs, including the Digital Preset LCD Meter & Flexible Spout.