The QSC20 from Qualwave is a RF & Microwave Circulator with Frequency 700 to 2800 MHz, Bandwidth 770 MHz, Average Power Forward 100 W, Insertion Loss 0.30 to 0.80 dB, Isolation 18 to 23 dB. Tags: Surface Mount, Surface Mount Circulator. More details for QSC20 can be seen below.