The T1EF1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.93 to 1.99 GHz, Average Power 75 W, Average Power Forward 75 W, Insertion Loss 0.2 dB, Isolation 23 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1EF1 can be seen below.