Features: 6 pieces guitar tunning peg knobs, practical guitar spare parts. Excellent workmanship, polished appearance, easy to install and use. Perfect for acoustic / eletric / folk guitar replacements. Made of zinc alloy, lightweight, durable. Comes with 6pcs mounting screws and 12pcs rubber rings. Specifications: Material: Zinc alloy Color: Black / Gold / Silver (Optional) Compatible Instrument: For acoustic guitar, eletric guitar, folk guitar Installation Hole Dimension: Approx. 3.5 * 3.15mm Item Size: 1.95 * 1.25cm / 0.77 * 0.49inch Item Weight: 50g / 1.76oz Package Size: 10 * 5 * 3cm / 3.9 * 2 * 1.2inch Package Weight: 51g / 1.8oz Packing List: 6 * Guitar Tuning Peg Knobs 6 * Screw 6 * Hard Rubber Ring (Black) 6 * Soft Rubber Ring (White)