The DC-898-115 from RF & Noise Components is a RF & Microwave Circulator with Frequency 890 to 915 MHz, Average Power Forward 250 W, Insertion Loss 0.2 to 0.25 dB, Isolation 23 to 26 dB, Return Loss 23 to 26 dB. Tags: Drop-in Circulator. More details for DC-898-115 can be seen below.