A rotary vane attenuator provides accurate and repeatable attenuation across a broad bandwidth, and the Flann Microwave 110 series is the industry standard to which all others are compared. The model 2311 covers 33 - 50GHz, having WG23 / WR22 waveguide flanges. Attenuation range 0-60dB.

This unit is in good "used" condition as shown below, with a few bumps and scratches from normal laboratory use. Tested, in good working order.