The RFLC313G27G37 from RF-Lambda is a Space Qualified Circulator with Frequency 2.7 to 3.7 GHz, Bandwidth 1000 MHz, Average Power Forward 50 W, Insertion Loss 0.70 dB, Isolation 38 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFLC313G27G37 can be seen below.