The filter employs dual technology with PP cotton and ion balls to effectively remove impurities from water. Specifically designed for hard water issues,it provides long-term stability and efficiently filters out rust,silt,heavy metals,and other large particles. This helps reduce skin dryness and itching while promoting healthy skin. Measuring 3.74 x 0.94 inches,it fits various mainstream showerhead types such as vortex,jet,and spiral styles. Name: Showerhead Filter Material: PP cotton and plastic Color: Blue and white Dimensions: 3.74 x 0.94 inches Important Notes: 1. Please allow for slight size variations due to manual measurement. 2. Replacement is generally recommended monthly,though frequency depends on local tap water quality. Visually replace the filter when it appears yellowed for easy monitoring. 3. Verify with your showerhead model before purchase. Installation is simple and quick. Premium Reliable Materials: Crafted from high-quality PP cotton and plastic,it effectively traps impurities while maintaining long-term stable filtration performance. Universal Size: Approximately 3.74 x 0.94 inches,compatible with various mainstream showerhead types such as vortex,jet,and spiral styles. High Value: 12-pack large capacity,sufficient for long-term household use,eliminating frequent repurchasing hassle and offering cost-effectiveness. High-Efficiency Composite Filtration: Utilizes dual PP cotton and ion ball technology to effectively filter water impurities,addressing hard water issues for cleaner,softer water quality. High-Efficiency Practical Filtration: Effectively removes rust,sediment,heavy metals,and other large particles from water. Helps reduce skin dryness and itching,nurturing healthy skin,hair,and nails. Especially suitable for bathing children and pets..