The T1BF5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.93 to 1.99 GHz, Insertion Loss 0.2 dB, Isolation 23 dB, Operating Temperature -10 to 55 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for T1BF5 can be seen below.