Fixed value attenuators are used to match signal power to receiver dynamic range in optical networks. The plug type configuration allows easy to use functionality 'straight out of the box". This allows connection directly to the fibre patch cord, for insertion onto the adaptor. RoHS, Reach compliant. Attenuation: 20 dB. Return loss (min): 40...60 dB. Fibre type: Single mode 9/125. Type of connector: SC/APC.