ABSTRACT: This is the user guide of the Maury Microwave 3.5mm Coaxial Calibration Kit from DC to 26.5 GHz for models 8050CK10/11 and 8050CK20/21. This series of 3.5mm coaxial calibration kits are designed to provide accurate calibrations of network analyzers in the DC to 26.5.0 GHz range. Each of these kits includes all the necessary calibration standards and associated hardware needed for the accurate calibration of most network analyzers.