The C1XV18 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.562 to 1.588 GHz, Average Power 0.5 W, Average Power Forward 0.5 W, Insertion Loss 0.5 dB, Isolation 26 dB. Tags: Module with Connectors, Coaxial Isolator. More details for C1XV18 can be seen below.