Wal-Rich 1715500 0-5 PSI Low Pressure Diaphragm Gas Pressure Test Gauge 2-1/2" Dial X 1/4" Bottom Mount Wal-Rich 1715500 0-5 PSI Diaphragm Gas Pressure Test Gauge 2-1/2" Dial X 1/4" Bottom Mount Specifications: 0-5 PSI 2-1/2" Face 1/4" Male NPT Brass Bottom Mount 1/10 Increments Accuracy: 1.5% Of Full Scale Range Please Note: This gauge is extremely sensitive. Over pressurizing this gauge will cause the measuring element to fail and render the gauge inoperable. Wal-Rich will not accept returns of gauges that are improperly used.