The KI 7013B-APC from Kingfisher International is a Fiber Optic Attenuator with Attenuation 2.0 - 60 dB, Attenuation Resolution 0.05 dB, Operating Temperature -15 to 55 Degree C, Optical Power w 1 W(30 dBm), Polarization Dependent Loss 0.1 dB. More details for KI 7013B-APC can be seen below.