The QDC2528C from Qualwave is a RF & Microwave Circulator with Frequency 2700 to 6000 MHz, Bandwidth 3500 MHz, Average Power Forward 10 to 200 W, Insertion Loss 0.3 to 0.8 dB, Isolation 16 to 23 dB. Tags: Drop-In, Drop-in Circulator. More details for QDC2528C can be seen below.