The 991-340370-451 from M2 Global Technology is a RF & Microwave Isolator with Frequency 3.4 to 3.7 GHz, Average Power Forward 20 W, Average Power Reverse 20 W, Insertion Loss 0.35 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-340370-451 can be seen below.