ABSTRACT: This is the user guide of the Maury Microwave WR75 Waveguide SSLT Calibration Kit for models WR75CK10\12 Series. The WR75CK10\12 series of waveguide SSLT calibration kits are designed to provide accurate calibrations of network analyzers in the WR75 band of 10.0 – 15.0 GHz. Each of these kits includes all the necessary SSLT calibration standards and associated hardware needed for the accurate calibration of most network analyzers.