Reducing Straight Union Application Air Fitting Side A Connection Type Push-to-Connect Fitting Side B Connection Type Push-to-Connect Fitting Side A Tube Outer Diameter 4 mm Fitting Side B Tube Outer Diameter 6 mm Fitting Material PBT Color White Maximum Operating Pressure 150 psi Maximum Operating Temperature 140 Degrees F Specific Fitting Shape Straight Release Type Sleeve Compatible Tube Material Nylon Polyurethane Minimum Operating Temperature 32 Degrees F