The 991-117127-903 from M2 Global Technology is a RF & Microwave Isolator with Frequency 11.7 to 12.7 GHz, Average Power Forward 5 W, Average Power Reverse 5 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-117127-903 can be seen below.