The NDC-2831 from Stellant Systems is a RF & Microwave Circulator with Frequency 2.85 to 3.15 GHz, Average Power Forward 2 W, Peak Power 5 W, Insertion Loss 0.3 to 0.4 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-in Circulator. More details for NDC-2831 can be seen below.