The WVQ-975M-50BW01 from Wevercomm is a RF & Microwave Circulator with Frequency 850 to 900 MHz, Average Power Forward 100 W, Average Power Reverse 50 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Module with Connector, Coaxial Circulator. More details for WVQ-975M-50BW01 can be seen below.