The 991-127132-091 from M2 Global Technology is a RF & Microwave Isolator with Frequency 12.7 to 13.25 GHz, Average Power Forward 5 W, Average Power Reverse 3 W, Insertion Loss 0.4 dB, Isolation 21 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-127132-091 can be seen below.