The VDC-1818-3C from VidaRF is a RF & Microwave Circulator with Frequency 1.805 to 1.88 GHz, Average Power Forward 250 W, Average Power Reverse 250 W, Peak Power 500 W, Insertion Loss 0.2 to 0.25 dB. Tags: Drop-in Circulator. More details for VDC-1818-3C can be seen below.