The C1HK1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.02 to 1.04 GHz, Average Power 266 W, Average Power Forward 266 W, Insertion Loss 0.25 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for C1HK1 can be seen below.