This is a high quality TNC Calibration Kit for network analyzer applications with 7 calibration standards made by Spinner (Germany). The frequency range is: 0 - 3 GHz. The set consists of: Termination resistance (f) BN 533752 Open-circuit (f) (I=18,46 mm) BN 806909 Short (f) (I=16,41 mm) BN 806907 Termination resistance (m) BN 533753 Open-circuit (m) (I=19,70 mm) BN 806809 Short (m) (I=22,93 mm) BN 806810 Coupling TNC BN 746601 1 each 3,5" disc: Calibration constants BN:533819