The T1AY1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.61 to 1.627 GHz, Average Power 10 W, Average Power Forward 10 W, Insertion Loss 0.3 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1AY1 can be seen below.