The UIYBCC4550A from UIY Inc. is a RF & Microwave Circulator with Frequency 950 MHz to 1.45 GHz, Average Power Forward 200 W, Average Power Reverse 200 W, Insertion Loss 0.6 dB, Isolation 16 dB. Tags: Coaxial Circulator. More details for UIYBCC4550A can be seen below.