Sealed voice mechanics, small button. Heavy Duty Internal Transmission. High-quality gaskets, steel tuners, strings (electric or acoustic) guitars. Especially for Stratocaster / Telecaster guitars or similar guitar/spare part. Location: 6L. Heavy Duty Internal. Easy to install and convenient to use. The voice mechanics rotate smoothly, allowing the player to tune in accurately and easily. Color: SilverMaterial: Metal Size: Spindle Axis: 9.8mm Package Contents: 6 x Guitar Machine Head (Left)6 x Washers6 x Screws6 x NutsOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is/- 1-3cm.