Description: A Set 6 Pcs Opened Semiclosed Guitar Tuning Pegs Tuners Machine Heads Metal Ferrules Bushing and Mounting Screws Materials: Metal Color: Chrome Size Chart: Bushing inner diameter: Approx. 6mm/ 0.23inch Bushing outer diameter: Approx. 8mm/ 0.31inch Ferrule Height: Approx. 8mm/ 0.31inch Inside diameter: Approx. 6.3mm/ 0.24inch Screw Thread diameter: Approx. 2.2mm/ 0.08inch Screw Length: Approx. 9mm-11mm/ 0.35-0.43inch Package Includes: 6 Pieces Metal Ferrules 6 Pieces Mounting Screws