Haltec Large Bore Adjustable Swivel Gauge is made of nickel-plated brass with an easy-to-read metal slide bar. Calibrated 10-150 PSI in 2 lb increments. Swivels 360° for those hard to reach valves.
To Calibrate: Using a gauge check station, check and compare the GA255S-RCL pressure. To increase pressure, turn set screw in (to the right). To decrease the pressure, turn the set screw out (to the left).