Pressure Gauge, 2.5 in. Steel Panel Mount Case, Copper Alloy Internals, 300 psi/kPa, 1/4 NPT Male Back Conn. Accurate and reliable general purpose dry gauge with vacuum & compound ranges, and ABS or Steel case. Ideal for applications including hydraulics, pneumatics, medical, pumps, compressors, refrigeration controls and more. Multiple connection options are available including panel mount. A wide variety of pressure ranges, scale options, connections sizes, and options including flanges, case options, cover rings, lens materials, pointers, and orifices are also available. Cleaning for Oxygen Service O2 is available only for dry or HL Halocarbon filled gauges.