Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3. High-quality material: This product is made of high-quality steel wire material, it is suitable for long-term use. 4. Long service life: Piano Strings has a total length of 1 meter, it is, sturdy and wear-resistant, and it is easy to install. 5. Our products can replace old strings in pianos, while also avoiding the tuning instability inherent in new strings. 6.The steel wire is spring tempered, with high tensile strength and high fatigue resistance. 7.The length is about 1 meter (manual measurement), you can diy it into the length you need. Very practical, easy to replace, can meet your different needs. 8.Suitable for replacing broken or old piano strings, easy to install. Note: The strings themselves must be kept on a flat surface so that the vibration of the sound can be more accurate. Note: Manual measurement, there is an error of 1-5CM. Specifications: Material:Steel Wire Color:Silver Brand name: BQLZR Model:13# Size: Diameter:0.775mm/0.031" Length: 1 Meter/39.37" Weight:20g Package include: 2 x Piano Strings