The T1ZY1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.427 to 1.525 GHz, Average Power 2 W, Average Power Forward 2 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for T1ZY1 can be seen below.