The WVQ-2045M-250BW01 from Wevercomm is a RF & Microwave Circulator with Frequency 1.92 to 2.17 GHz, Insertion Loss 0.3 dB, Isolation 20 dB, Operating Temperature -40 to 85 Degree C. Tags: Module with Connector, Coaxial Circulator. More details for WVQ-2045M-250BW01 can be seen below.