1 Set 2R 2L 4 String Guitar Reeds Keys Tuner Machine Head Gear Ratio 1:18OOTDTYComs: 100% Brand New and High Quality Made of zinc alloy material, durable to use. It's easy to replace old and dirty guitar tuners. Guitar locking tuning machine with heavy duty internal gear, durable and comfortable. Locking tuners help to provide better tuning and greater stability. Gear ratio, 1:18, designed to fit modern 10mm headstock holes. Package Included: 4 Pieces Lock Guitar Tuner Pins, 8 Mounting Screws and 4 Threaded Sleeves. Specification: Material: Steel + Zinc AlloyColor: As the picture showsPackage weight: approx.105g Size: size: approx.3.9x3.4x2.3cm/1.5x1.3x0.9inPackage included: 4 x Guitar Machine Head (2R, 2L)4 x Threaded Sleeves8 x Screws for MountingNote: Please allow 1-2cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!