Features: Precisions engineered 5PC sealed bass tuning machines deliver accurate tuning stability for 5 string electric bass guitars, featuring durable all metal construction to withstand rigorous performances. The sealed gear design with ferrule and screw components prevents string slippage and corrosion, while available in fashion black/silver finishes to matching your instrument's aesthetics. Ideal for professional bassists and music enthusiasts seeking reliable hardware upgrades for their 5 string bass guitars in studio recordings or live gigs. Maintain perfect intonation during play, rehearsals, or stage performances with these corrosion resistant machine head designed for long term durability. Each set includes precisely machined tuning pegs with quick install components, ensuring seamless replacement to enhances your bass guitar's playability and tone consistency. Specifications: Material: Metal Size: As Pictures Show Color: Black/Silver Package Includes: 5PCS Metal Guitar String Knobs note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.