The A Grade Plug-Type Fixed Attenuator from AC Photonics is a Fiber Optic Attenuator with Attenuation 1 - 20 dB, Attenuation Resolution 1 dB, Operating Temperature -20 to 70 Degree C, Polarization Dependent Loss Less than -0.5dB - 0.1dB(typ.), Return Loss Less than -50 dB(PC) Less than -60 dB(APC). More details for A Grade Plug-Type Fixed Attenuator can be seen below.