Reducing Union Application Gases Liquids Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Brass Fitting Side A Tube Outer Diameter 1/4 in Fitting Side B Tube Outer Diameter 1/8 in Maximum Operating Pressure 3 500 psi Maximum Operating Temperature 400 Degrees F Overall Length 1 17/32 in Specific Fitting Shape Straight Reducing Connector Compatible Fitting Brands A-LOK Thread Size A 7/16-20 Thread Size B 5/16-20