The MEMS-12-B-1 from AGILTRON is a Fiber Optic Switch with Insertion Loss 0.6 - 1.0 dB, Operating Temperature -5 to 70 Degree C, Optical Power 300 - 500 mW, Polarization Dependent Loss 0.1 dB, Storage Temperature -40 to 85 Degree C. More details for MEMS-12-B-1 can be seen below.