The FA-300-3U3U-1300/1550-9/125-S-5-M1 from OZ Optics Ltd. is a Fiber Optic Attenuator with Wavelength Dependent Loss ±0.1 dB, Attenuation 5 dB, Return Loss >50 dB, Attenuation Tolerance ±0.5 dB, ±0.7 dB, ±1 dB, Polarization Dependent Loss ±0.1 dB. More details for FA-300-3U3U-1300/1550-9/125-S-5-M1 can be seen below.