Reducing Union Application Air Chemicals Non-Potable Water Fitting Side A Connection Type Compression Fitting Side B Connection Type Compression Fitting Material Stainless Steel Fitting Side A Tube Outer Diameter 1/4 in 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 39 13/32 mm Specific Fitting Shape Straight Reducing Connector Compatible Fitting Brands LET-LOK Swagelok