Product: Enameled wire (insulated copper wire) with inner pure copper and surface insulating paint, polyester patent leather coating Packing: 1 x enameled wire (500g / 17.6 oz) Construction details: Inner layer is pure copper; outer coating is an insulating paint with a polyester patent leather finish Size and classification: The color classification shown by the system corresponds to the wire diameter (specification). Copper wire follows national standard specifications. Specification refers to the diameter of the drawn copper wire, that is, the inner diameter without paint film Electrical and temperature ratings: Insulation withstand voltage 3000V–5000V; temperature resistance 130–180 degrees Celsius Key advantages: Can be directly welded, suitable for frequency applications Use scenarios: Winding coils for motors, transformers, and inductors in electrical equipment RF and frequency circuit applications requiring stable insulation and weldability DIY electronics projects and prototyping where compact, solderready windings are needed Material and performance highlights: Pure copper core ensures good conductivity; enamel insulation provides reliable electrical isolation; polyester coating contributes to durability and insulation performance Compatibility and practicality: Packaged as a single 500g spool, suitable for standard wiring and winding tasks that require adherence to national standards for copper wire diameter and insulation requirements