The C1BU14 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.7 to 1.9 GHz, Average Power 400 W, Average Power Forward 400 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for C1BU14 can be seen below.