The QCC-2000-4000-K5-N-1 from Qualwave is a RF & Microwave Circulator with Frequency 2000 to 4000 MHz, Bandwidth 2000 MHz, Average Power Forward 500 W, Insertion Loss 0.6 dB, Isolation 15 dB. Tags: Module with Connector, Coaxial Circulator. More details for QCC-2000-4000-K5-N-1 can be seen below.