Product type and construction Enameled wire, also known as insulated copper wire, with a pure copper inner conductor and surface insulation coating. It also includes a polyester jacket described as polyester patent leather. Dimensional and spec references Color classification shown by the system corresponds to wire diameter (specification). The copper wire follows national standard specifications. Specification refers to the diameter of the drawn copper wire, i.e., the inner diameter without the paint film. Packaging and contents Product: enameled wire (insulated copper wire) Inner conductor: pure copper Insulation: surface insulation paint with polyester jacket Packaging: 1 x enameled wire (500 g / 17.6 oz) Electrical and thermal performance Voltage rating: 3000 V to 5000 V Temperature resistance: 130 to 180 degrees Distinctive features: can be directly welded, suitable for frequency applications, and easy to carry Why you may need this product Reliable insulation and direct weldability enable efficient coil and winding work without complex prep Suitable for frequency circuits and compact, portable projects Standardized copper core and insulation provide consistent performance across applications Practical applications and use scenarios Transformer and inductor windings in power supplies and small electronic devices frequency RF coils and resonant circuits for hobbyist and professional projects , prototyping, and DIY electronics that require a portable, durable enameled wire with strong insulation and weldability