What is this? Silicone Fiberglass Insulation Coated Sleeving is an insulation product made from a braided fiberglass material that is coated in silicone rubber. Designed to fit over wires and cables without needing the application of heat.It is generally used whenever wires or cables require additional protection to survive in harsh environments,especially at high temperatures.Also offers good resistance to abrasion to protect and guide cables or wires in difficult locations. What will I get? Material: Alkali-free Fiberglass Length: 2 Meter / 6.6 Feet Inner Diameter: 12mm Working Temp Range: –30??+400? Working Voltage: 1500V Flame Resistance: VW-1 Color: Black In the package of 5pcs high temp silicone fiberglass sleeves Are there any advantages of the product? Uses of Fire Sleeve applied to as a motor, engine, plug wire, fuel lines, decorative light, etc. Common seen in industries such as automotive, marine, aircraft, electrical, etc. Fiberglass sleeving is beneficial in all applications where the material is exposed to very high or low temperatures, high voltage work, and high altitude, as well as applications where conformity is necessary. How to use it? Cut wire sleeving with a HOT cutting to prevent fraying, if a hot cutting is not available, make sure to scorch the edges with another heat source (for example: use the flame from a lighter). What should I notice? Please notice this cable sleeve is not slit down the middle. Electrical wires should never be hot. Should increase the gauge of the wire if you are exceeding the recommended load of that wire. This product would make the wire get hot by not letting it cool and might melt the insulation on said wire.