The RFLC-301-4N from RF-Lambda is a Space Qualified Circulator with Frequency 2 to 4 GHz, Bandwidth 2000 MHz, Average Power 100 W, Average Power Forward 100 W(Power Handling), Insertion Loss 0.5 to 1.1 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFLC-301-4N can be seen below.