PTR25500
1PCS PFEIFFER IKR251 vacuum gauge DN25 ISO-KF PTR25500
A nice touch is the OE QUALITY documentation included with every purchase.
PFEIFFER Cathode Vacuum Gauge KF-25, PT R25 500, PTR25500, D-35614 ASSIAR,
Oil Equipment Mfg has a reputation for making gear that doesn't break down often.