Do not exceed the minimum bend radius (30mm.). Flame resistance IEC 60332-1. RS Pro Standard Fibre Patch Cords - ST to ST. The RS Pro multimode, fibre optic cable has a straight tip (ST) to straight tip (ST) connector with a twist lock coupling that are easy to insert and remove. The low smoke zero halogen (LSZH) cables come in OM1 and OM 2 which both work well with LED based equipment. Features and Benefits. Orange sheath colour Available in Simplex and Duplex configurations Polished ceramic ferrules Cost effective Various lengths available