The WVQ-868M-20BW01 from Wevercomm is a RF & Microwave Circulator with Frequency 858 to 878 MHz, Average Power Forward 250 W, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -20 to 65 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for WVQ-868M-20BW01 can be seen below.