ARRA KU520 WG18 0-25dB VARIABLE ATTENUATOR
Manufactured by ARRA as their part number KU520-25, this is a WG18 / WR62 (so 12.4 - 18.0Ghz) waveguide variable attenuator, 0-25dB.
Manufactured from aluminium, the section is approximately 75mm long.
Good used condition.