Dunlop 6567 System 65 Supelube Gel PenKeep the moving parts of your stringed instruments working smoothly with the Dunlop Superlube gel pen. With its flexible spatula tip, you can easily apply superlube gel where you need itfrom saddles and nuts to string trees and tremolo partsand the thick gel will stay put. Dunlop Superlube gel is the safe lubricant for all of your stringed instrument maintenance needs.