The MMCCC700B from Mesa Microwave is a RF & Microwave Circulator with Frequency 1 to 2 GHz, Bandwidth 1000 MHz, Average Power Forward 300 W, Average Power Reverse 300 W, Insertion Loss 0.7 dB. Tags: Module with Connectors, Coaxial Circulator. More details for MMCCC700B can be seen below.