The 991-122138-091 from M2 Global Technology is a RF & Microwave Isolator with Frequency 12.2 to 13.8 GHz, Average Power Forward 5 W, Average Power Reverse 3 W, Insertion Loss 0.5 dB, Isolation 19 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-122138-091 can be seen below.