High-quality material: the shower filter is made of high-quality PP cotton, which is safe and environmentally friendly, and has highly efficient filtering, so you can enjoy clean water quality during use. 3-layer filter: shower head filter with improved filter system, high-quality filter materials, PP cotton filter, anti-limescale negative lon mineral balls and cotton pad form a triple filter system that can effectively filter out chlorine, sand, rust, bacteria and other impurities in the water, soften hard water and maintain the pH value of the water. Easy installation: when turning the shower head clockwise during installation and screw it into the shower pipe. Compatible with a variety of removable hand showers, so you can easily install them yourself to provide them with pure water. Universal clean water core cotton core can be used in various facilities such as apartment, hotels, gyms, swimming pools, etc. Applicable scenarios: the universal cotton core for water cleaning can be used in various bathing facilities such as apartments, hotels, gyms, swimming pools, etc. The package includes: 10 pieces PP cotton filter element shower head, the filter size is 8 x 2.4 x 1.2 cm / 3.15 x 0.98 x 0.47 inches, suitable for most shower heads. Can be replaced every 1-2 months depending on local water quality.