The RFC237W200M165 from RF-Lambda is a Space Qualified Circulator with Frequency 150 to 180 MHz, Bandwidth 30 MHz, Average Power 200 W, Average Power Forward 200 W(RF Power CW), Insertion Loss 0.45 to 0.50 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFC237W200M165 can be seen below.