DN 40 ISO-KF Flexible Vacuum Hose 

The Leybold DN 40 ISO-KF Centering Ring is a vacuum flange component used to align and seal DN 40 ISO-KF connections in vacuum systems. It is installed between two ISO-KF flanges and used with a clamping ring to help create a secure vacuum-tight connection. This component is suitable for vacuum system assembly, service, replacement, and general ISO-KF hardware connections.