3 Pack Prevost ISI061251 1/4" body air couplers. These are a very high quality Prevost coupler that features 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. The coupler features a 1/4" male NPT threaded inlet and are compatible with Prevost Industrial Interchange Style air plugs. Prevost ISI061251 1/4" Body Air Couplers - Industrial Style (3-Pack) Brand new 3 Pack Prevost ISI061251 1/4" body air couplers. These are a very high quality Prevost coupler that features 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. The coupler features a 1/4" male NPT threaded inlet and are compatible with Prevost Industrial Interchange Style air plugs. Specifications: 1/4" Male NPT Easy To Use Anti-marring Heavy Duty Composite Body Steel Inner Construction *Warranty valid only if used with Prevost high quality steel plugs.