The WVI-400M-40BW01 from Wevercomm is a RF & Microwave Isolator with Frequency 380 to 420 MHz, Average Power Forward 100 W, Average Power Reverse 100 W, Insertion Loss 0.5 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for WVI-400M-40BW01 can be seen below.