20 Series Coupler, Brass, 1/4" Body Size, 3/8" Hose Barb, General Purpose, Accepts Industrial Interchange Nipples (A-A-59439, MIL-C-4109F, ISO 6150-B), 27.4" Hg Vacuum-300PSI (21Bar) Working Pressure, Nitrile Seals, Temp Range Degrees F: (-40 to +250)