The MS-10-C-SM from DiCon Fiberoptics is a Fiber Optic Switch with Insertion Loss 0.8 dB, Operating Temperature -5 to 70 Degree C, Optical Power 500 mW, Polarization Dependent Loss 0.10 dB, Storage Temperature -40 to 85 Degree C. More details for MS-10-C-SM can be seen below.