Size:4 oz BNTECHGO 28 Gauge Enameled Magnet Wire is made of high quality copper and good coating with enamel.Perfect enameled magnet wire for implementing into your science projects/experiments or personal DIY,used by engineers and hobbyists alike! Product Details Size: 4 oz(527 feet) Color: Red Diameter: 0.0122 inches(0.31mm) Tolerance: +/-0.05mm Item Weight: 1 item for 4 ounces Gauge: 28AWG Specification Met: NEMA(NEMA Description: MW-80-C) Insulation type: Solder able Polyurethane Overcoat Build: Single Min-Nom Maximum Resistance At 20℃ Ω/km:222.8