This extension nozzle for WD-40 spray is a practical little accessory for mechanical maintenance, designed to address two key challenges: “precise spraying” and “splash prevention.”

• Precise extension design: The slender nozzle can reach deep into narrow areas such as bicycle chains and mechanical crevices, delivering rust inhibitor or lubricant directly to the target spot—no more worrying about overspray onto other components.
• Foam-based splash protection: With a gentle press, the nozzle dispenses a foamy liquid that adheres better and is less likely to splatter, reducing waste while keeping surrounding parts clean.
• Wide range of applications: In addition to bicycle chains, it’s also ideal for maintaining door locks, hardware fittings, and other small components, making it an essential “detail tool” for home repairs and outdoor gear upkeep.

Its combination of extension and foam technology makes WD-40 and similar sprays much more efficient and tidy to use.

Note: I’ve currently found two different nozzle sizes in the WD-40 series, so please check which type your spray can has before printing and select the appropriate print bed accordingly.

Small nozzle on the left, large nozzle on the right