1、[4 Pcs Set] These bass guitar tuning peg is designed in a stylish black color, specifically suitable for 4 string right handed bass guitars. 2、[Reliable Structure] Featuring accurate 17:1 gear ratio, sealed lubrication, cast housing, and metal knob, the bass tuning machine head ensures reliable tuning adjustments. 3、[Ideal Replacement Part] Designed to fit standard 14mm peg holes, the sealed bass guitar tuner provides a perfect replacement option for old or malfunctioning tuning pegs. 4、[Easy Installation] With a comfortable grip and easy to adjust mechanism, this bass guitar machine head offers convenient tuning for optimal sound performance. 5、[Enhanced Performance] Upgrade your bass guitar with this reliable tuning key set, providing improved tuning stability and accuracy, making it an essential accessory for bass players.