Includes 3 extra lemon discs 9 extra replacement filters The Waterdrop Vitamin C Showerhead system (WD-SF02-SR) is a high-quality water filter designed by Waterdrop. This model includes multiple extras, providing users with a comprehensive solution for purifying their water. The system is designed to be easy to install and offers a convenient way to enjoy clean and refreshing water during showers. It is a practical and reliable option for improving the quality of your shower experience.