The MMCCC320B from Mesa Microwave is a RF & Microwave Circulator with Frequency 2.2 to 4.5 GHz, Bandwidth 2300 MHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.6 dB. Tags: Module with Connectors, Coaxial Circulator. More details for MMCCC320B can be seen below.