The OCPM from AGILTRON is a Fiber Optic Circulator with Insertion Loss 0.8 to 1 dB, Wavelength 1310 nm, 1530 to 1565 nm (C-Band, L-Band), Isolation 38 to 45 dB, Return Loss >50 dB, Optical Power 500 mW(Power Handling). More details for OCPM can be seen below.