MEASUREMAN Diaphragm Type Capsule Low Pressure Gauge, 2-1/2" Dial, 1/4"NPT Lower Mount, Adjustable, 0-5PsiMEASUREMAN Diaphragm Type Capsule Low Pressure Gauge, 2 1 2" Dial, 1 4"NPT Lower Mount, Adjustable, 0 5Psi For accurate measuring air, water, natural gas, or other medias not corrosive to copper alloy 2 1 2" dial size, 1 4"NPT lower mount Pressure range: 0 5psi Black steel case, snap on plastic window, Beryllium diaphragm type capsule, ensures good accuracy, stable performance, long life Accuracy: + 2 1 2%, pointer micro adjustable DescriptionFor