Features: It is a PP cotton filter, which can effectively filter large particles such as rusts, sand, and heavy metals in the water, remove impurities in the shower water and monitor water quality. Easy to replace: no tool required to replace. Simply open the casing of the shower cartridge filter, remove the old one and replace it with a new. Suitable for most detachable handheld showers, just twist the lower part of the body and put filter cotton. We recommend replacing it every 1~2 months. Of course, you can change time to replace filter according to the water quality of your city and the degree of pollution of filter. Great for households, especially those with sensitive skin or hair, find to minimize chemically exposure during daily showers. Specifications: Materials: PP cotton Length: about 20cm/7.87inch Package Includes: 5Pcs/set PP Cotton Filter note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.