This erhu string adjuster is mainly made of durable material, which can serve you for a long time without being easily rusted or . 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. Features -Color:Black -Material:Alloy -Size:6.90X6.20X5.20cm/2.71X2.44X2.04in -Basic tool for erhu users to correct their voice, easy to install, easy to operate. -Rotating the brass knob can adjust the string spacing, and the two golden knobs can be installed on the corresponding holes to fine-tune the inner and outer strings. -Fine-tuning thousands of pounds, wide applicability, suitable for erhu, huqin and other musical instruments. - craftsmanship and great detailing ensured its popularity. Can be given as a gift to family and friends. -Efficient and durable Erhu Tuner is a practical tool for Erhu lovers and DIY lovers. Package list: 2 x Erhu Tuner