10 Pack Brand new Prevost IRC 61251 1/4" body air coupler. 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! This coupler features a 1/4" female NPT threaded inlet. This coupler is compatible with Prevost Industrial Interchange Style air plugs and has a 3 year manufacturer's warranty.