RS PRO Duplex Multi Mode OM3 Fibre Optic Cable, 8.5mm, Black, 250m, Terminated/Unterminated: Unterminated, Number of Cores: 12, Fire Behaviour: Flame Retardant, Low Smoke Zero Halogen (LSZH), Maximum Pulling Tension: 1000 (Short Term) N, 500 (Long Term) N, Minimum Bend Radius: 10D (Installed) mm, 20D (Loaded) mm.