The MPO/APC 12 core SM attenuator from Anfkom Telecom is a Fiber Optic Attenuator with Attenuation 0 to 30 dB, Insertion Loss 0.5 dB, Return Loss >60 dB, Operating Wavelength 1310 to 1550 nm. More details for MPO/APC 12 core SM attenuator can be seen below.