The QCC2025B from Qualwave is a RF & Microwave Circulator with Frequency 1300 to 4000 MHz, Bandwidth 400 MHz, Average Power Forward 100 W, Insertion Loss 0.25 to 0.40 dB, Isolation 20 to 25 dB. Tags: Module with Connector, Coaxial Circulator. More details for QCC2025B can be seen below.