The T1BJ5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.84 to 1.87 GHz, Average Power 50 W, Average Power Forward 50 W, Insertion Loss 0.17 dB, Isolation 23 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1BJ5 can be seen below.