The C3ZH18 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.1 to 3.5 GHz, Average Power 50 W, Average Power Forward 50 W, Insertion Loss 0.4 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for C3ZH18 can be seen below.