The RFLC301G17G27 from RF-Lambda is a Space Qualified Circulator with Frequency 1.71 to 2.69 GHz, Bandwidth 980 MHz, Average Power Forward 50 W, Insertion Loss 0.4 to 0.5 dB, Isolation 20 to 21 dB. Tags: Module with Connector, Coaxial Circulator. More details for RFLC301G17G27 can be seen below.