The T1ZP1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.71 to 1.85 GHz, Average Power 15 W, Average Power Forward 15 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T1ZP1 can be seen below.