K4542 Pressure Gauge Low Pressure Process 4-1/2 in 0 to 20 in H20 and 0 to 12 oz Connection Size 1/4 in NPT Connection Location Lower Smallest Graduation 1 in H2O Graduations 2 in H2O Accuracy +/-1 Percent Case Material Phenolic Case Color Black Socket Material Brass Tube Material Brass Filled With None/Field Fillable Lens Material Glass Ring Material Polypropylene Operating Temp Range -40 Degrees to 200 Degrees F Characteristics Micrometer Pointer