The T-8S43U-20 from Teledyne Microwave Solutions is a RF & Microwave Isolator with Frequency 8 to 12.4 GHz, Average Power Forward 50 W, Average Power Reverse 2 W, Insertion Loss 0.4 dB, Isolation 18 dB. Tags: Module with Connector, Coaxial Isolator. More details for T-8S43U-20 can be seen below.