The JID2000T4000R1 from JQL Electronics is a RF & Microwave Isolator with Frequency 2 to 4 GHz, Average Power Forward 100 W, Average Power Reverse 10 W, Insertion Loss 0.6 dB, Isolation 18 dB. Tags: Drop-In, Drop-In Isolator. More details for JID2000T4000R1 can be seen below.