The SF-7001 replacement shower filter by Tier1 for system SF-7000 will ensure you maintain the best water in your shower. Using a 3-stage filtering system, it can reduce the harsh effects of hard water and chlorine on your skin and hair. This system is made of safe, BPA-free materials, and allows for superior filtration without diminishing flow rate and pressure. Filter up to 13,000 gallons, depending on your use, and this filter will notify you with its replacement indicator whenever it is time to replace the filter in your shower system.