The T1BF15 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.75 to 1.87 GHz, Average Power 100 W, Average Power Forward 100 W, Insertion Loss 0.25 dB, Isolation 25 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1BF15 can be seen below.