Color and diameter classification: The color classification shown by the system corresponds to the wire diameter (specification). The copper wire follows national standard specifications. Gauge definition: Gauge refers to the diameter of the bent copper wire, i.e., the inner diameter without the paint film. Specifications Product: enameled wire, also known as insulated copper wire Core: inner layer of pure copper Coating: surface insulating paint, polyester patent leather Packing: 1 piece of enameled wire (500 g / 17.6 oz) Voltage and temperature performance Voltage rating: 3000 to 5000 V Temperature resistance: 130 to 180 degrees Celsius Key features: can be directly welded; frequency resistance; easy to carry Benefits and why you need it voltage insulation and reliable performance for coil winding and voltage projects Pure copper core provides strong conductivity and consistent electrical behavior Direct welding capability simplifies assembly and prototyping Good frequency performance supports RF and related applications Portable and easy to store in hobby, , and field work Use scenarios DIY transformers, inductors, and small motor windings that require a robust insulated copper wire frequency circuits or RF components where direct welding and conductivity are advantageous Field repairs or prototyping projects needing a compact, transportable wire with strong insulation Material and compatibility notes Copper: pure copper core Insulation: surface coating of insulating paint with polyester enamel Packing quantity: 1 piece per package, 500 g / 17.6 oz Suitable for applications requiring a combination of insulation, conductivity, and weldability