The VDCL-1819 from VidaRF is a RF & Microwave Circulator with Frequency 1.85 to 1.91 GHz, Average Power Forward 100 W, Insertion Loss 0.3 dB, Isolation 23 dB, Operating Temperature -40 to 85 Degree C. Tags: Drop-in Circulator. More details for VDCL-1819 can be seen below.