Businesses in the insulated wire and cable category manufacture, supply or distribute conductors covered with insulating materials that help prevent electrical contact, protect against damage and suit different operating conditions. Products may include single-core and multi-core wires, flexible cables, control and instrumentation cables, data and communication cables, and cables designed for power distribution. Insulation and outer sheaths can be made from materials such as PVC, rubber, polyethylene or other polymers, selected according to the cable's intended use. Customers may include electrical contractors, manufacturers, builders, utilities and maintenance teams. Suppliers typically provide cables in reels or drums and may offer cut lengths, different conductor sizes, colours and sheath types. Some businesses also supply screened, armoured, heat-resistant or flame-retardant products, subject to the relevant specification.