The CIR01F4P-7525 from ETL Systems is a RF & Microwave Circulator with Frequency 470 to 550 MHz, Average Power Forward 100 W, Average Power Reverse 30 W, Insertion Loss 0.45 dB, Isolation 19 dB. Tags: Module with Connector, Coaxial Circulator. More details for CIR01F4P-7525 can be seen below.