The Ametek/US Gauge 133580 is a 1404 series test gauge with a 60 psi pressure max, 6.0" dial size, 1/4" NPT lower mount connection, brass wetted material, and aluminum case material. Series 1400 SOLFRUNT test gauges are designed to combine laboratory test gauge accuracy with carrying case or rolling test stand portability, and frequently are permanently installed on instrument shop test benches or test panels. These gauges feature a ±0.25% accuracy (Grade 3A) solid front case, which provides a partition between the pressure measuring element and the window, with a pressure relieving back. Accurate gauge reading is accomplished by sighting the knife edge of the indicating pointer with the paralleling pressure graduation, while simultaneously eliminating the pointer’s image on the mirrored dial edge. An adjustable pointer provides front zero adjustment. Other calibration adjustments ca be made from the back without removal from the case.