The QSC12R3B from Qualwave is a RF & Microwave Circulator with Frequency 1400 to 6000 MHz, Bandwidth 600 MHz, Average Power Forward 30 to 60 W, Insertion Loss 0.30 to 0.60 dB, Isolation 17 to 23 dB. Tags: Surface Mount, Surface Mount Circulator. More details for QSC12R3B can be seen below.