The T12Q1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 12.5 to 13.5 GHz, Average Power 0.5 W, Average Power Forward 0.5 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Microstrip, Microstrip Isolator. More details for T12Q1 can be seen below.