The CVA21-20/D from MCLI is a RF Variable Attenuator with Frequency 4 to 18 GHz, Attenuation Range 20 dB, Power 7 W, Peak Power 64.77 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Continuously Variable, Rotary. More details for CVA21-20/D can be seen below.