20 Series Coupler, Brass Body W/Steel Sleeve, 1/2" Body Size, 1/2" NPT Female Port, General Purpose, Accepts Industrial Interchange Nipples (A-A-59439, MIL-C-4109F, ISO 6150-B), 300PSI (21Bar) Working Pressure, Nitrile Seals, Temp Range Degrees F: (-40 to +250),