The RFCR9112 from RF-CI is a RF & Microwave Circulator with Frequency 49 to 57 MHz, Average Power Forward 200 W, Average Power Reverse 100 W, Insertion Loss 0.8 to 1 dB, Isolation 17 to 19 dB. Tags: Drop-in Circulator. More details for RFCR9112 can be seen below.