The T1ZJ1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.62 to 1.65 GHz, Average Power 3 W, Average Power Forward 3 W, Insertion Loss 0.7 dB, Isolation 15 dB. Tags: Drop-In, Drop-In Isolator. More details for T1ZJ1 can be seen below.