The 1x2 1310/1550nm PM Optical Circulator from Shanghai Fsphotonics Technology is a Fiber Optic Circulator with Insertion Loss 0.6 to 0.9 dB, Wavelength 1310 nm, 1550 nm, Isolation 20 to 46 dB, Return Loss 50 dB, Optical Power 300 mW. More details for 1x2 1310/1550nm PM Optical Circulator can be seen below.
