The D19-M1719C01 from QUEST Microwave is a RF & Microwave Circulator with Frequency 1.71 to 1.99 GHz, Average Power Forward 200 W, Average Power Reverse 10 W, Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Drop-in Circulator. More details for D19-M1719C01 can be seen below.