The 991-198217-091 from M2 Global Technology is a RF & Microwave Isolator with Frequency 19.8 to 21.7 GHz, Average Power Forward 10 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-198217-091 can be seen below.