The ATc8-12.4 from Narda-ATM is a RF & Microwave Circulator with Frequency 8 to 12.4 GHz, Average Power Forward 2 W, Peak Power 30 W, Insertion Loss 0.35 to 0.4 dB, Isolation 20 to 22 dB. Tags: Coaxial Circulator. More details for ATc8-12.4 can be seen below.