The CT-4038-OT from UTE Microwave is a RF & Microwave Isolator with Frequency 3.6 to 4.3 GHz, Average Power Forward 1 W, Insertion Loss 0.30 dB max, Isolation 22 dB min. Tags: Module with Connector, Coaxial Isolator. More details for CT-4038-OT can be seen below.