The CMA400500AH from 3Rwave is a RF & Microwave Circulator with Frequency 4 to 5 GHz, Average Power Forward 50 W, Insertion Loss 0.4 to 0.5 dB, Isolation 18 to 20 dB, Return Loss 18 to 20 dB. Tags: Drop-in Circulator. More details for CMA400500AH can be seen below.