The ANO 51-2004-20 from ANOISON Electronics LLC is a Fixed Attenuator with Frequency DC to 6 GHz, Attenuation 20 dB, Power 20 W, Peak Power 300 W, Attenuation Accuracy +/- 0.75 dB. Tags: Module with Connectors. More details for ANO 51-2004-20 can be seen below.