ISI061253 1/4" body air coupler with 1/2" male npt inlet threads. This is a very high quality Prevost coupler that features a non-marring, impact resistant, high grade composite body. 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" male NPT threaded inlet. 2 Pack Prevost ISI061253 - 2 Pack 2 Prevost ISI061253 1/4" body air coupler with 1/2" male npt inlet threads. These are very high quality Prevost couplers that feature a non-marring, impact resistant, high grade composite body. These couplers are 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" male 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" Male 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.