The PIH-01A-1800 from Stellant Systems is a RF & Microwave Circulator with Frequency 1.7 to 2 GHz, Average Power Forward 100 W, Average Power Reverse 30 W, Insertion Loss 0.5 dB, Isolation 60 dB. Tags: Module with Connector, Coaxial Circulator. More details for PIH-01A-1800 can be seen below.