The T15D1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 15.9 to 16.6 GHz, Average Power 0.01 W, Average Power Forward 0.01 W, Insertion Loss 1.6 dB, Isolation 20 dB. Tags: Module with Connectors, Coaxial Isolator. More details for T15D1 can be seen below.