The RFCR9136 from RF-CI is a RF & Microwave Circulator with Frequency 150 to 174 MHz, Average Power Forward 150 W, Average Power Reverse 100 W, Insertion Loss 0.5 to 0.8 dB, Isolation 15 to 18 dB. Tags: Drop-in Circulator. More details for RFCR9136 can be seen below.