The WR-05 Waveguide Calibration Kit is a metrology grade G-band VNA calibration kit designed for 140–220 GHz frequency range. It includes fixed short, fixed matching load, waveguide shims (1/8 λg, 1/4 λg, 3/8 λg), two waveguide quick connects, screws, alignment pins, a hex screwdriver, and calibration data USB drive.