The QCC-4000-8000-K3-N-1 from Qualwave is a RF & Microwave Circulator with Frequency 4000 to 8000 MHz, Bandwidth 4000 MHz, Average Power Forward 300 W, Insertion Loss 0.6 dB, Isolation 15 dB. Tags: Module with Connector, Coaxial Circulator. More details for QCC-4000-8000-K3-N-1 can be seen below.