The Keysight / Agilent / HP 85055A verification kit is used to verify that a network analyzer is operating within its specified performance. All verification kits include measurement data and uncertainties that are traceable to the U.S. National Institute of Standards and Technology (NIST). The 85055A verification kit has a type-N connector and covers a frequency range of 300 kHz to 18 GHz. The 85055A supports the Agilent 8510, 8719, 8720 and PNA series of network analyzers. This kit includes a 10 cm airline, stepped impedance airline, 20 dB and 50 dB attenuators.