Tests hydraulic oil circuits on your machinery with high accuracy and measures flow from 2.5 to 100 gpm Flow Accuracy to +/- 1 percent of indicated value and Pressure accuracy of +/- 1.6 percent of full scale Pressure range up to 6,000 psi and Temperatures up to 250 deg F Standard burst disc protection system prevents spillage of hydraulic fluid in the event of an overpressure condition Accommodates bi-directional flow, reads flow in both directions, pressure on the high side of valve and Port is 1-5/16" -12UN #16 SAE ORB