The ADC042GD from ADMOTECH is a RF & Microwave Circulator with Frequency 410 to 430 MHz, Average Power Forward 150 W, Average Power Reverse 100 W, Insertion Loss 0.3 to 0.45 dB, Isolation 18 to 20 dB. Tags: Drop-in Circulator. More details for ADC042GD can be seen below.