Standard Fiber Patch Cords - ST to ST Fiber optic ST to ST patch cords with polished ceramic ferrule ST connectors and a maximum insertion loss of 0.5dB. These Fiber optic ST to ST patch cables are available in simplex and duplex configurations with a 50/125μm (OM2) or 62/125μm or (OM1) Fiber size and are available in a variety of cable lengths. The orange insulation sheaths of these Fiber optic ST to ST patch cords are LSZH (low smoke zero halogen).