10piece set of copper fine tuners designed for Erhu instruments. These tune adjusters worn or missing tuning hardware and restore precise pitch control with simple installation. Key benefits Precise tuning control: Fine adjustment screws allow subtle pitch changes for accurate tuning during practice and performance. Durable material: Solid copper construction provides reliable wear resistance and consistent performance over time. Easy to install: Simple screwon design lets players and technicians existing tuners quickly without specialized tools. Ready replacement parts: Ten pieces in one set make it easy to multiple instruments or keep spares on hand for maintenance. Features and specifications Quantity: 10 pieces Material: copper Function: fine tuner tune adjuster for Erhu Role: replacement musical instrument accessory and tuning hardware Installation: straightforward fit for Erhu tuning mechanisms; intended to restore or original fine tuners Performance and compatibility Restores fine tuning function to Erhu instruments by providing stable microadjustments. Designed to serve as direct replacements for worn or missing Erhu fine tuners without altering string setup or sound production. Use scenarios and maintenance: corroded or stripped fine tuners on an Erhu during routine instrument servicing. Luthier and workshop stock: Keep a supply of identical copper tuners for quick turnaround repairs and instrument refurbishing. Performance preparation: Swap in fine tuners before a recital or recording session to ensure reliable tuning stability. Additional notes The set includes ten copper fine tuners only. Installation requires basic hand tools commonly used for string instrument adjustments. Suitable for musicians, instrument technicians, and shops that need consistent replacement parts for Erhu tuning systems.