The CIR-PM-30-B-1-0-0.05W-FB from AFW Technologies is a Fiber Optic Circulator with Insertion Loss 1.2 to 1.6 dB, Wavelength 1030 nm, Isolation 22 dB, Return Loss >50 dB, Optical Power 500 mW. More details for CIR-PM-30-B-1-0-0.05W-FB can be seen below.