3M™ Twisted Pair Flat Cable HF100 Series offers low smoke zero halogen (LSZH) insulation. The advantages of LSZH insulation are the low smoke (IEC 61034-2:2005), and low toxicity of combustion gases (NF X 70-100-2:2006), reducing the risk to firefighters, and reducing the soot and corrosion damage to nearby equipment.