The C1BL1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 1.85 to 1.99 GHz, Average Power 5 W, Average Power Forward 5 W, Insertion Loss 0.7 dB, Isolation 40 dB. Tags: Drop-In, Drop-In Isolator. More details for C1BL1 can be seen below.