FX-005 YOUKILOON Non-Enameled Copper Wire. Ultra-Fine: 0.005mm,Length: 50M High-Precision Repair Grade Ideal for motherboard and micro-jumper repairs. Type: It's a insulated copper wire, ideal for making connections on circuit boards. Diameter: The wire is extremely thin, measuring just 0.005mm. Length: Each roll contains 50 meters of wire. Material: Made from high-quality copper. Common Uses: This type of wire is primarily used for repairing mobile phones, tablets, and other electronic devices. It's especially useful for creating jumper wires on circuit boards.