The CA18-20/D from MCLI is a RF Variable Attenuator with Frequency 2.8 to 6.5 GHz, Attenuation Range 20 dB, Attenuation Accuracy 1.5 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for CA18-20/D can be seen below.