The NDC-6012 from Stellant Systems is a RF & Microwave Circulator with Frequency 6 to 12 GHz, Average Power Forward 2 W, Peak Power 5 W, Insertion Loss 0.5 to 0.7 dB, Isolation 15 to 17 dB. Tags: Drop-In, Drop-in Circulator. More details for NDC-6012 can be seen below.