EOF0049 (Dual Port) and EOF0050 (Single Port) KF40 Vacuum Feedthrough Flanges - Micronor Sensors Inc.
Amazon.com: Superior Grade - KF40 Tee 3-Ways Vacuum Adapter, All Ends with KF-40 (NW40) Flange, Made of Stainless Steel 304, Finely Polished : Industrial & Scientific