This oil filler cap seal ring ensures a perfect seal at the oil filler cap level, positioning itself under the filler spout. It is compatible with the Volkswagen Beetle as well as the Volkswagen Combi Bay Window, two iconic models particularly sought after by classic vehicle enthusiasts. Its replacement is recommended during any restoration or service to prevent oil leaks and maintain the engine in optimal working condition. A simple but essential part to ensure the reliability and longevity of these classics.