Compression Fitting Union, Application Chemical, Fitting Side A Connection Type Compression, Fitting Side B Connection Type Compression, Fitting Material Stainless Steel, Fitting Side A Tube Outer Diameter 4 mm, Fitting Side B Tube Outer Diameter 4 mm, Material Grade 316, Maximum Operating Pressure 10, 300 psi, Maximum Operating Temperature 1, 200 Degrees F, Overall Length 37 5/16 mm, Specific Fitting Shape Straight Connector, Compatible Fitting Brands Let-Lok, Swagelok