The NDC-5864 from Stellant Systems is a RF & Microwave Circulator with Frequency 5.85 to 6.425 GHz, Average Power Forward 2 W, Peak Power 10 W, Insertion Loss 0.3 to 0.5 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-in Circulator. More details for NDC-5864 can be seen below.