The guitar tuning pegs button is made of high-grade acrylic. This material will make it more wear-resistant, sturdy, for long-lasting use Elegant Appearance: Elegant appearance and color, the guitar head is beautifully decorated. A great button for standard acoustic guitars and electric guitar adjustment nails. Smooth Exquisite workmanship and good texture give you a smooth Fits most electric and acoustic guitars as replacement tuning machine head knobs Equipped with 6 white ferrules, 6 black ferrules and 6 screws for easy installation. Package includes 6 Pcs buttons， 6 Pcs white ferrules ，6 Pcs black ferrules and 6 screws