The 60K34R-MSON3 from Rosenberger is a VNA Calibration Kit with Frequency DC to 4 GHz, Max Input Power 1 W, Operating Temperature 0 to 50 Degree C, Return Loss 0.15 to 40 dB, Storage temperature -55 to 90 Degree C. Tags: Passive Calibration Kit. More details for 60K34R-MSON3 can be seen below.