Description: Set of 6 sealed machine heads (3L + 3R) Compatible with electric or acoustic guitar With heavy duty internal gear Durable, anti-rust and anti-dust Material: Zinc alloy Size Chart: Size: Approx. 45 x 38 x 22mm/ 1.77 x 1.49 x 0.86inch Package Includes: 6 Pieces Machine Heads 6 Pieces Mounting Screws 6 Pieces Ferrules 6 Pieces Threaded Bushings Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size