The RFCR9139N from RF-CI is a RF & Microwave Circulator with Frequency 132 to 154 MHz, Average Power Forward 150 W, Average Power Reverse 100 W, Insertion Loss 0.50 to 8 dB, Isolation 15 to 18 dB. Tags: Coaxial Circulator. More details for RFCR9139N can be seen below.