The GL-T-1218-20-30 from A-Info is a RF & Microwave Isolator with Frequency 120 to 180 MHz, Bandwidth 25 MHz, Average Power Forward 30 W, Average Power Reverse 10 W, Insertion Loss 0.6 dB. Tags: Module with Connector, Coaxial Isolator. More details for GL-T-1218-20-30 can be seen below.