The 8850Q series of type N calibration kits are low cost fixed load kits designed to operate from DC to 18 GHz. The kits are provided with the standards necessary to perform calibrations of scaler or vector network analyzers and are supplied in a rugged, molded, plastic case for durability and field service use. Calibration kit constants are provided so they can be keyed in from the front panel of the analyzer. The kits are available in a female/male configurations or in single sex configurations.