Wadoy 140PSI Air Compressor Pressure Regulator Gauge with Industrial Interchange Air Fitting- 1/4 Inch NPT Male Quick-Connect Coupler & Plug (Regulator and Gauge) Female Thread Dia:1/4PT. Durable and utility; easy to install and disassemble. With the barometer, can be set and read the data. With the valve knob, can according to need to adjust air pressure. For any reason you are not satisfied with your purchase, contact us directly to get replacement or refund. 100% Satisfaction Guarantee!