This erhu string adjuster is mainly made of durable plastic and copper material, which can serve you for a long time without being easily rusted or damaged. It is portable with a lightweight and compact size, easy for carry and storage, practical to use. Made with excellent craftsmanship, it is easy to install, and can be well applied to your erhu tuner replacement. Great for erhu stability and string vibration, great adjust parts and replacement. Features -Color: Brown. -Material: Plastic, copper. -Size: About 3.80X2.80X1.10cm/1.49X1.10X0.43in. - Made of copper knobs and plastic shell, anti-rust, anti-bend, , durable and practical. - This string tune adjuster is an excellent adjuster tool for erhu stability and string vibration. - Easy to install, no more pegs, no tools necessary, the for erhu are very easy to install. - The efficient and durable Erhu tuner is a practical tool for Erhu lovers and DIY enthusiasts. - High precision adjustment, smooth knobs, high durability, practical and professional, . Package list: 1 x Erhu