The CC-515-282 from RF & Noise Components is a RF & Microwave Circulator with Frequency 470 to 560 MHz, Average Power Forward 600 W, Insertion Loss 0.15 to 0.2 dB, Isolation 23 to 24 dB, Return Loss 23 to 24 dB. Tags: Module with Connectors, Coaxial Circulator. More details for CC-515-282 can be seen below.