The 991-127133-903 from M2 Global Technology is a RF & Microwave Isolator with Frequency 12.7 to 13.3 GHz, Average Power Forward 30 W, Average Power Reverse 30 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-127133-903 can be seen below.