The 991-390400-851 from M2 Global Technology is a RF & Microwave Isolator with Frequency 380 to 400 MHz, Average Power Forward 150 W, Average Power Reverse 110 W, Insertion Loss 0.6 dB, Isolation 50 dB. Tags: Drop-In, Drop-In Isolator. More details for 991-390400-851 can be seen below.