The Keysight W281C is a high-precision adapter that provides a connection between an EIA WR-10 waveguide and a 1.0 mm coaxial connector (female). Designed for the frequency range of 75 to 110 GHz (W-band), it offers excellent RF performance with a maximum standing wave ratio (SWR) of 1.16. The adapter has a UG-387/U flange in accordance with MIL-F-3922/67B-010 and is ideal for applications in high-frequency measurement technology, especially in conjunction with Keysight 8510XF systems.