Prevost ISI061203 1/4" body air coupler with 1/2" female npt inlet threads Prevost ISI061203 1/4" body air coupler with 1/2" female npt inlet threads. This is a very high quality Prevost coupler that features a non-marring, impact resistant, high grade composite body. This coupler is easy to use for anyone and is built for safety and high efficiency! The quick release button on this coupler allows you to easily release plugs with one hand! It also purges the air on everything down line, such as air hose and tools, so that there is no hose whipping or sudden pressure releases. This coupler features a 1/4" body and has a 1/2" female NPT threaded inlet.This coupler is compatible with Prevost Industrial Interchange Style air plugs and has a 3 year manufacturer's warranty.* Specifications: 1/2" Female NPT Accepts 1/4" Plugs Easy To Use Anti-marring Heavy Duty Composite Body Steel Inner Construction *Warranty valid only if used with Prevost high quality steel plugs. NOTE: 1/2" Female NPT measures approximately 3/4" in diameter when using a ruler or tape measure.