Union Mender 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 4 mm Fitting Material Stainless Steel Material Grade 316L Color Silver Includes Pre-Applied Thread Sealant Yes Maximum Operating Pressure 290 psi Maximum Operating Temperature 437 Degrees F Overall Length 1 3/8 in Specific Fitting Shape Straight Connector