The T-18S33U-20 from Teledyne Microwave Solutions is a RF & Microwave Isolator with Frequency 18 to 26.5 GHz, Average Power Forward 50 W, Average Power Reverse 2 W, Insertion Loss 1 dB, Isolation 17 dB. Tags: Module with Connector, Coaxial Isolator. More details for T-18S33U-20 can be seen below.