For example: Agilent E4440A or Anritsu 68369
Calibration Kit
Keysight / Agilent 85058B
Standard Mechanical Calibration Kit, DC to 67 GHz, 1.85 mm
Manufacturer: Keysight / Agilent
Keysight / Agilent 85058E
Economy Mechanical Calibration Kit, DC to 67 GHz, 1.85 mm
Manufacturer: Keysight / Agilent
Keysight / Agilent 85093-60010
NFTS RF module with both connectors female
Manufacturer: Keysight / Agilent
Keysight / Agilent 85097B
RF Electronic Calibration (ECal) VNA Interface Kit (for use with 8753 and 8720 series network analyzers)
Manufacturer: Keysight / Agilent
Keysight / Agilent 85519A
4-in-1 OSLT Mechanical Calibration Kit, DC to 18 GHz, Type-N (f) 50 ohm
Manufacturer: Keysight / Agilent
Keysight / Agilent 85520A
4-in-1 OSLT Mechanical Calibration Kit, DC to 26.5 GHz, Type-3.5 mm (m) 50 ohm
Manufacturer: Keysight / Agilent
Keysight / Agilent N4431A
RF Electronic Calibration Module, 300 kHz to 13.5 GHz, 3.5 mm, 4-port
Manufacturer: Keysight / Agilent
Keysight / Agilent W11644A
Mechanical Calibration Kit, 75 to 110 GHz, Waveguide, WR-10
Manufacturer: Keysight / Agilent