Dewar Internals | Dewar | ... Cabling | ... Kermit has a 2" vacuum attachment, while the pump has a 3"; the appropriate adapter hose can usually be found in the UH "Vacuum parts" box in the black cabinet in AEOS Room 3. ... There are wrenches in the "Kermit Cryo Tools" box in two different sizes: one for screwing the flange into place, and the other for holding the cable still so it does not twist while you screw the flange into place. ... Disconnect the power cable from the cold head. ...