The C1YK1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.62 to 1.67 GHz, Average Power 100 W, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 25 dB. Tags: Drop-In, Drop-In Isolator. More details for C1YK1 can be seen below.