Compression Fitting Union, Application Air, Fitting Side A Connection Type Swivel FNPT O-Ring, Fitting Side B Connection Type Swivel FNPT O-Ring, Finish/Coating Zinc Nickel-Plated, Fitting Material Steel, Fitting Side A Tube Outer Diameter 1/4 in, Fitting Side B Tube Outer Diameter 1/4 in, Maximum Operating Pressure 9,200 psi, Maximum Operating Temperature 500 Degrees F, Overall Length 1 19/32 in, Specific Fitting Shape Straight Swivel Connector, Compatible Fitting Brands Seal-Lok(TM)