11m*0.1mm Magnet Wire 100m*0.2mm Qa Enameled Copper Wire Red Magnetic Wire For Inductance Coil Relay Electric Meter Coil Winding - Electrical Wires - AliExpress
Enameled Copper Magnet Wire – 11 meters / 0.1mm diameter : ID 3522 : $0.95 : Adafruit Industries, Unique & fun DIY electronics and kits