The UIYDI1919B from UIY Inc. is a RF & Microwave Isolator with Frequency 4 to 5.1 GHz, Average Power Forward 60 W, Average Power Reverse 30 W, Insertion Loss 0.35 to 0.4 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-In Isolator. More details for UIYDI1919B can be seen below.