The GL-T-183-20-30 from A-Info is a RF & Microwave Isolator with Frequency 180 to 300 MHz, Bandwidth 50 MHz, Average Power Forward 30 W, Average Power Reverse 10 W, Insertion Loss 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for GL-T-183-20-30 can be seen below.