The QDC2525X from Qualwave is a RF & Microwave Circulator with Frequency 350 to 4000 MHz, Bandwidth 770 MHz, Average Power Forward 100 to 250 W, Insertion Loss 0.25 to 0.65 dB, Isolation 15 to 25 dB. Tags: Drop-In, Drop-in Circulator. More details for QDC2525X can be seen below.