The QDC4040A from Qualwave is a RF & Microwave Circulator with Frequency 1700 to 3000 MHz, Bandwidth 1200 MHz, Average Power Forward 100 to 200 W, Insertion Loss 0.50 to 0.70 dB, Isolation 16 to 17 dB. Tags: Drop-In, Drop-in Circulator. More details for QDC4040A can be seen below.