The RKT1G18B11A from RF-Lambda is a RF Variable Attenuator with Frequency DC to 18 GHz, Attenuation Range 11 dB, Attenuation Step 1 dB, Attenuation Accuracy ±4.5 dB, Power 1 W. Tags: Module with Connectors, Rotary, Programmable. More details for RKT1G18B11A can be seen below.