The DC-460-178 from RF & Noise Components is a RF & Microwave Circulator with Frequency 450 to 470 MHz, Average Power Forward 250 W, Insertion Loss 0.3 to 0.35 dB, Isolation 20 to 23 dB, Return Loss 20 to 23 dB. Tags: Drop-in Circulator. More details for DC-460-178 can be seen below.