The NDC-0111 from Stellant Systems is a RF & Microwave Circulator with Frequency 1 to 1.1 GHz, Average Power Forward 2 W, Peak Power 150 W, Insertion Loss 0.3 to 0.5 dB, Isolation 20 to 23 dB. Tags: Drop-In, Drop-in Circulator. More details for NDC-0111 can be seen below.