The MMCCC190A from Mesa Microwave is a RF & Microwave Circulator with Frequency 6 to 18 GHz, Bandwidth 12000 MHz, Average Power Forward 60 W, Average Power Reverse 60 W, Insertion Loss 1.5 dB. Tags: Module with Connectors, Coaxial Circulator. More details for MMCCC190A can be seen below.