This tarnish resistant wire from Wire Elements by the BeadSmith is great for jewelry making, wire wrapping and crafting. The wire is made of 99.99% copper and is color coated. Color: Bright Copper 20 Gauge Wire (.032 inch.) 15-yard spool (45 feet or approximately 13.5 meters).Temper: Medium Quantity: 1 Spool NOTE: Platings and color coatings are permanent, but this does not make them immune to scratches and dings. For the least risk of damage to the wire's surface, we recommend using nylon jaw pliers whenever possible.