The MMCCC800A from Mesa Microwave is a RF & Microwave Circulator with Frequency 28 to 70 MHz, Bandwidth 2 to 3 MHz, Average Power Forward 50 W, Average Power Reverse 50 W, Insertion Loss 1.5 to 2.1 dB. Tags: Module with Connectors, Coaxial Circulator. More details for MMCCC800A can be seen below.