The T1ZS1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.62 to 1.66 GHz, Average Power 30 W, Average Power Forward 30 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T1ZS1 can be seen below.