The C2BK1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 2.07 to 2.21 GHz, Average Power 100 to 1900 W, Average Power Forward 100 to 1900 W, Insertion Loss 0.25 dB, Isolation 25 dB. Tags: Drop-In, Drop-In Isolator. More details for C2BK1 can be seen below.