The MS2-1x12 from DiCon Fiberoptics is a Fiber Optic Switch with Insertion Loss 0.8 - 1.5 dB, Operating Temperature -5 to 70 Degree C, Optical Power 500 mW, Polarization Dependent Loss 0.15 dB, Storage Temperature -40 to 85 Degree C. More details for MS2-1x12 can be seen below.