The VDC-3436-75-4C from VidaRF is a RF & Microwave Circulator with Frequency 3.9 to 4.2 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-3436-75-4C can be seen below.