Check the listing for details. Vacuum Pump Clamp - KF16, KF25 & KF40. Condition: Used. Listed at 45.00 USD. Vacuum Pump Clamp - KF16, KF25 & KF40 19/PK. a.MDC Vacuum Products K200-C (about 75 mm). KF40/NW40: 55mm 5.