The T17D1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 17.7 to 19.7 GHz, Average Power 1 W, Average Power Forward 1 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T17D1 can be seen below.