Suitable for most removable handheld showers, just twist the bottom of the body and put the filter cotton on PP cotton filter can effectively filter large particles such as rust, sand, heavy metals in the water, remove impurities in the shower water, monitor the water EASY REPLACEMENT: No tools required for replacement. Simply open the shower cartridge filter casing and remove the old filter and replace with the new one We recommend replacing every 1-2 months. Of course, you can change the filter time according to the water or dirt in the city Ideal for homes who want to minimize exposure to chemicals during daily showering, especially those with sensitive skin or hair