The VDC-1819-75-4C from VidaRF is a RF & Microwave Circulator with Frequency 1.92 to 1.99 GHz, Average Power Forward 100 W, Average Power Reverse 100 W, Peak Power 300 W, Insertion Loss 0.3 to 0.35 dB. Tags: Drop-in Circulator. More details for VDC-1819-75-4C can be seen below.