The T5BL1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 5.4 to 5.9 GHz, Insertion Loss 2 dB, Isolation 25 dB, Operating Temperature -54 to 85 Degree C. Tags: Module with Connectors, Coaxial Isolator. More details for T5BL1 can be seen below.