The 991-171199-851 from M2 Global Technology is a RF & Microwave Isolator with Frequency 1.71 to 1.99 GHz, Average Power Forward 75 W, Average Power Reverse 100 W, Insertion Loss 0.7 dB, Isolation 40 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-171199-851 can be seen below.