The NDC-6375 from Stellant Systems is a RF & Microwave Circulator with Frequency 6.3 to 7.5 GHz, Average Power Forward 2 W, Peak Power 15 W, Insertion Loss 0.4 to 0.6 dB, Isolation 18 to 22 dB. Tags: Drop-In, Drop-in Circulator. More details for NDC-6375 can be seen below.