The JID3400T4200SM1 from JQL Electronics is a RF & Microwave Isolator with Frequency 3.4 to 4.2 GHz, Average Power Forward 30 W, Average Power Reverse 10 W, Peak Power Forward 0.1 kW, Insertion Loss 0.5 dB. Tags: Drop-In, Drop-In Isolator. More details for JID3400T4200SM1 can be seen below.