LSZH heat-shrink tube is environmentally friendly products which does not contain halogen(F, Cl, Br, I, At), or diffuse lead, cadmium, chromium, mercury and other toxic substances and does not release toxic fumes(hydrogen halide, carbon monoxide, carbon dioxide and so on) when burned. The product has excellent flame retardant performance, little smoke when burned and non-corrosive gas escape. It is Widely used in nuclear power stations, subway stations, telephone switching and computer control centers, high-rise buildings, hotels, radio and TV stations, important military facilities, oil platforms, as well as Staff more focused, low-density areas of air.