The ADC900DD from ADMOTECH is a RF & Microwave Circulator with Frequency 8.25 to 8.75 GHz, Average Power Forward 30 W, Average Power Reverse 20 W, Insertion Loss 0.4 to 0.6 dB, Isolation 17 to 19 dB. Tags: Drop-in Circulator. More details for ADC900DD can be seen below.