The RFLC-402-4N from RF-Lambda is a Space Qualified Circulator with Frequency 4 to 8 GHz, Bandwidth 4000 MHz, Average Power Forward 80 W, Insertion Loss 0.4 to 1.5 dB, Isolation 18 to 18.5 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFLC-402-4N can be seen below.