Vacuum Fitting Centering Ring, Compatible Tube Outer Diameter 1 1/2 in, Includes Screen Screen Not Included, Inner Ring Material Stainless Steel, Maximum Operating Temperature 320 Degrees F, Recommended Sterilization Autoclave, Compatible Flange Outside Diameter 2 3/16 in, Vacuum Rating 10-7 torr @ 72 Degrees F, Standards GB4982-ISO-K, Minimum Operating Temperature 4 Degrees F. This item has been restricted from sale in the following state (s): []