The C1DK5 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.19 to 1.41 GHz, Average Power 60 W, Average Power Forward 60 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for C1DK5 can be seen below.