The RFSL9121N from RF-CI is a RF & Microwave Isolator with Frequency 150 to 174 MHz, Average Power Forward 100 W, Average Power Reverse 20 W, Insertion Loss 0.5 to 0.8 dB, Isolation 15 to 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for RFSL9121N can be seen below.