The T3ZH25 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.4 to 4.2 GHz, Average Power 1 W, Average Power Forward 1 W, Peak Power 200 W, Insertion Loss 0.5 dB. Tags: Drop-In, Drop-In Isolator. More details for T3ZH25 can be seen below.