💧 6 PP Cotton Filters: 6 filters for year-round use (recommended to change every 1 or 2 months). Of course, you can decide when to change the filter yourself depending on the water quality in your city and the degree of filter pollution. Our products are only compatible with shower heads with an inner diameter of . Please check the dimensions before purchasing! 💧 The hard water filter is non-toxic, odorless, environmentally friendly, and easy to replace. In addition, it can remove contaminants present in the water and effectively block large particles such as rust, sand, suspended solids, and insect eggs. It is recommended to change it frequently and forget about dirty water! 💧 Three-layer Filter: The shower head filter has an updated filtration system. High-quality filter material, PP filter cotton, anti-scale mineral beads, and makeup remover cotton form a triple filtration system that effectively filters chlorine, sand, rust, bacteria, and other impurities from the water,