Unequal 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 6 mm Fitting Side B Tube Outer Diameter 8 mm Fitting Material Nylon Color Black Includes Pre-Applied Thread Sealant No Maximum Operating Pressure 290 psi Maximum Operating Temperature 176 Degrees F Overall Length 38 mm Specific Fitting Shape Straight Reducing Connector Release Type Button