Tube Insert, Application Compression, Cooling, Compatible Fitting Connection Type Compression, Compatible Tube Outer Diameter 6 mm, Compatible Tube Inner Diameter 4 mm, Fitting Material Brass, Material Grade C26000, Maximum Operating Pressure 609, Maximum Operating Temperature 250 Degrees F, Overall Length 11 1/2 mm, Specific Fitting Shape Tube Insert, System of Measurement Metric, Standards CNOMO, PED, REACH, RoHS, Compatible Tube Hardness Not Applicable, Compatible Tube Material Polymer