NOTE: This 2 pack replacement filter cartridges only fit for eboatop filtered handheld shower heads (ASIN:B0F32GD6VM). It won't fit for shower heads from other brands. Multi-Stage Filtration: Our Handheld shower head with filters including KDF55,Vitamin C,Calcium sulfite,Dechlorination balls,Activated carbon,Ceramic balls,Minerals,etc.,removes chlorine,heavy metals and impurities,preventing dry skin and odors for healthier showers! We'd suggest replacing the filters every 3-6 months. (The specific lifespan depends on the water quality in your area). Healthy Water: This premium handheld shower filters not only reduce chlorine,impurities and bad odors,but also inhibit limescale build-up and dramatically reduce the effects of hard or chemical filled water on your hair,skin and nails,restoring them to the natural state of health. Shower Filtration Solution Expert: With over 15 years of expertise in bathroom filtration technology,Eboatop is designed specifically to optimize water quality in the U.S. Eboatop shower filtration features an advanced multi-stage filtration system that effectively removes impurities while maintaining strong water pressure. Easy Replacement: Only 1 minute! No special skill or tools required! Simply unscrew counterclockwise to remove the old filter cartridge of your shower head and install a new one. We provide two filters to facilitate customers to replace them in time..