18-gauge tinned copper Artistic Wire, 30ft (10 yard) spools. This type of Artistic Wire is constructed with a copper core that's finished with a permanent color coating. The exact color of this wire may vary. This wire will patina (naturally oxidize and darken) with time, to provide a vintage look. Use 18-gauge wire for chunkier jewelry and craft projects that still require a soft, malleable material that's easy to bend.