A good filter will produce clean water to remove rust.Residual chlorine is removed from the chlorine removal ball.SIMPLE & EASY INSTALLATION - No need to hire a plumber or any other professional to install this showerhead filter. You can easily install this showerhead filter by yourself in a matter of minutes. The showerhead is compatible with many detachable showerheads, making it quick, simple, and convenient to install into your showerhead without any extra installation tools. It makes it easy to replace the filter for maximum water quality.For maximum high-quality water, each filter is recommended to be used 8-10 weeks, depending on the water quality, before being changed. If the filter is being clogged or the water flow is slowing down, we also recommend a filter change.colour:whiteMaterial:PP cottonsize:10.5cmPackage Contents:12 x Shower filterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.