The 18A-20 from Aeroflex-Inmet is a 50 ohm, SMA fixed attenuator which operates from DC to 18 GHz. It has an attenuation of 20 dB and an attenuation accuracy of 0.5 dB. It can handle up to 2 W avg. power and 250 W of peak power. The attenuator is 0.99 .03 in. ( 0.8 mm) in length. It is also available in other configurations with frequencies of 2.5 GHz/6/18 GHz and Attenuation levels of 0-10, 12,15,20,30 and 40 dB.