Keysight 85053B Verification Kit: 300kHz-26.5 GHz, 7.5cm Airline, 20/40dB Attenuator, 8505xx Series
Keysight 85056A Standard Mechanical Calibration Kit: DC-50 GHz, 2.4mm (m/f), 8505xx Series, for precise calibration of vector network analyzers and other RF test equipment.
Keysight 85059B Precision Mechanical Calibration Kit: DC to 120 GHz, 1.0mm (m/f), 8505xx Series, OSL Calibration