Variable Attenuator
Product Details:

• These are simple and conveniently variable type set-level attenuators to provide at least 20db (15 db in V&W Bands) of continuously variable attenuation.
• These consists of a movable lossy vane inside the section of a waveguide by means of a micrometer. The configuration of lossy-vane is so designed to obtain the low VSWR characteristics over the entire frequency band.
  
• These are meant for adjusting power level and isolating a source from the load etc.