1、Made of quality metal material, sturdy, durable and wear-resistant. 2、One set of 6 quality chrome machine heads for steel string of electric or acoustic guitars (6R). 3、Perfect guitar machine head for replacement parts. 4、Heavy duty internal gear that gear ratio is 1:18. 5、Come with mounting screws, easy to install. Features: 1. Made of quality metal material, sturdy, durable and wear-resistant. 2. One set of 6 quality chrome machine heads for steel string of electric or acoustic guitars (6R). 3. Perfect guitar machine head for replacement parts. 4. Heavy duty internal gear that gear ratio is 1:18. 5. Come with mounting screws, easy to install. Specifications: Material: Metal Gear Ratio: 1:18 Packing List: 6 * Guitar Machine Head 1 * Mounting Screw Kit Note: 1. Conversion 1cm = 10mm = 0.39inch 2. No retail package. 3. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 4. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 5. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.