compatible with 6 quality chrome machine heads for steel string acoustic guitars Durable and highly reliable for easy, smooth, and precise tuning With heavy duty internal gear, easy and labor-saving to replace and adjust stringProduct Specification: 100% Brand New Material: Metal Post spacing: 29 mm Shaft diameter: 6 mm Shaft length: 28 mm gear ratio 1:15 color: Silver Weight: 112gPackage content:2 x Tuning peg machine heads(3R+3L) 8 x Mounting screws 6 x FerrulesNote:1If you are not satisfied with our product you received, you can send emails to us at any time We will reply you instantly and help you solve your problem Key Product Features 2Due to different monitors, there may be a little color difference