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 2011 covers 18 - 26.5GHz, having WG20 / WR42 waveguide flanges. Attenuation range 0-60dB.

This unit is in "used" condition as shown below, with a few bumps and scratches from normal laboratory use. The control knob is missing and a non-standard base plate is fitted. Tested, in good working order.