The PM Type B 3 ports Fiberoptic Circulator from Aistana is a Fiber Optic Circulator with Insertion Loss 0.6 to 0.8 dB, Isolation 20 - 30 dB, Operating Temperature -5 to 50 Degree C, Optical Power 500 mW, Return Loss 55 dB. More details for PM Type B 3 ports Fiberoptic Circulator can be seen below.