The C1EX1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.35 to 1.45 GHz, Average Power 100 W, Average Power Forward 100 W, Peak Power 200 W, Insertion Loss 0.25 dB. Tags: Drop-In, Drop-In Isolator. More details for C1EX1 can be seen below.