The T1ZU20 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.85 to 1.91 GHz, Average Power 5 W, Average Power Forward 5 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T1ZU20 can be seen below.