The T15C4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 12.9 to 15.1 GHz, Average Power 0.1 W, Average Power Forward 0.1 W, Insertion Loss 0.8 dB, Isolation 20 dB. Tags: Microstrip, Microstrip Isolator. More details for T15C4 can be seen below.