The T3ZM1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 3.7 to 4.2 GHz, Average Power 0.1 to 15 W, Average Power Forward 0.1 to 15 W, Insertion Loss 0.4 dB, Isolation 18 dB. Tags: Microstrip, Microstrip Isolator. More details for T3ZM1 can be seen below.