Glasfaser LWL Adapter Versions: Please choose version Adapterbox 1 x Neutrik OpticalCON-Duo Glasfaserbuchse -> 1 x Patchkabel LC-LC MM duplex 0,5m Adapterbox 2 x Neutrik OpticalCON-Duo Glasfaserbuchse -> 2 x Patchkabel LC-LC MM duplex 0,5m