Vitamin C Shower Filter: Multi-stage filtration process helps reduce common water impurities and sediments while maintaining strong water pressure EASY INSTALLATION: Tool-design allows for quick setup - simply unscrew your existing showerhead and attach the filter unit UNIVERSAL DESIGN: Standard connection size fits most shower arms,making it compatible with the majority of household plumbing systems DURABLE CONSTRUCTION: Made with high-quality materials to ensure long-lasting performance and resistance to daily wear and tear MAINTENANCE: Filter cartridge can be easily replaced every 3-4 weeks or 1,000 gallons of water usage for optimal performance.