The DA-100-3S-1300/1550-9/125-S-40 from OZ Optics Ltd. is a Fiber Optic Attenuator with Wavelength Dependent Loss Up to 0.3 dB (Attenuation), Attenuation 1 to 60 dB, Attenuation Resolution 0.01 dB, Insertion Loss 1 to 2 dB, Return Loss 40 dB. More details for DA-100-3S-1300/1550-9/125-S-40 can be seen below.