The JID3700T4300VM1 from JQL Electronics is a RF & Microwave Isolator with Frequency 3.7 to 4.3 GHz, Average Power Forward 10 W, Average Power Reverse 10 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-In, Drop-In Isolator. More details for JID3700T4300VM1 can be seen below.