ABSTRACT: This is the user guide of the Maury Microwave WR112 Waveguide SSLT Calibration Kit for models WR112CK10\12 Series. The WR112CK10\12 series of waveguide SSLT calibration kits are designed to provide accurate calibrations of network analyzers in the WR112 band of 7.05 – 10.0 GHz. Each of these kits includes all the necessary SSLT calibration standards and associated hardware needed for the accurate calibration of most network analyzers.