Prevost ISI061253 1/2" MNPT High Quality Safety Air Coupler is a tapered male thread coupler. Designed with a non-marring, impact resistant, high grade composite body. Push button creates quick coupling that safely vents the airline with one hand. It also purges the air on everything down line, such as the air hose and tools for no hose whipping or sudden pressure releases. This coupler features a 1/4" female NPT threaded inlet. This coupler is compatible with Prevost Industrial Interchange Style air plug. Specifications: Type: Safety Coupler Body Diameter: 1/4" Thread Size: 1/2” Thread Type: NPT Thread Style: Male Pressure: 174 PSI Air flow at 100 PSI: 34 SCFM - DP = 10 PSI Temperature Range: 5°F to 158°F Interchange Type: Industrial Material: Composite Safety : ISO 4414 safety coupling Color: Black Body, Blue Button Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.