The C1CU1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.71 to 1.785 GHz, Average Power 5 W, Average Power Forward 5 W, Insertion Loss 0.35 dB, Isolation 25 dB. Tags: Drop-In, Drop-In Isolator. More details for C1CU1 can be seen below.