Features Milton M - style "Kwik - change" couplers and plugs will interchange with all manufacturers who comply with the dimensional requirements of military specifications MIL - C - 4109 Coupler bodies are brass with brass sleeves Plugs are case hardened steel, plated to resist rust Seals, Buna - N Specifications Capacity: 40 SCFM air flowContents: One 1/4" NPT female M - style coupler One 1/4" NPT male M - style plug Temp: 250° F NPT Size: 1/4" Female Max PSI: 300 PSI inlet pressure