The UIYDC1919B from UIY Inc. is a RF & Microwave Circulator with Frequency 400 MHz to 5.1 GHz, Average Power Forward 60 W, Average Power Reverse 60 W, Insertion Loss 0.3 dB, Isolation 23 dB. Tags: Drop-in Circulator. More details for UIYDC1919B can be seen below.