The RFC27W500G25 from RF-Lambda is a Space Qualified Circulator with Frequency 2.1 to 2.9 GHz, Bandwidth 800 MHz, Average Power 500 W, Average Power Forward 500 W(Power Handling CW), Insertion Loss 0.35 to 0.5 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFC27W500G25 can be seen below.