The ST Female to Female Fibre Attenuator from Teleweaver is a Fiber Optic Attenuator with Attenuation 1 to 30 dB, Insertion Loss 1, Operating Temperature -40 to 75 Degree C, Polarization Dependent Loss 0.1 dB, Return Loss 50 dB. More details for ST Female to Female Fibre Attenuator can be seen below.