Music/Piano Wire in Size 12 (0.029 inch diameter) is a high-carbon steel wire engineered for precision and dependability across a wide range of applications. While it is a trusted staple in piano repair and maintenance, its versatility makes it equally valuable for custom spring fabrication, hobby builds, model making, and countless DIY and shop projects that demand a strong, consistent, fine-gauge wire. The high-carbon composition delivers impressive tensile strength combined with the flexibility needed to perform reliably in demanding situations where accuracy is critical. Whether you are restoring a piano or tackling a creative build, this wire offers the consistent quality and performance you need. Important sizing note: music wire does not follow standard American Wire Gauge (AWG) sizing conventions. If you are replacing an existing wire, it is strongly recommended that you measure your current wire using a caliper or micrometer capable of reading in thousandths of an inch (0.001") to ensure you select the correct size for your specific project.