This is a set of 4 replacement filters specifically for Unicharm's deodorizing fan. This product is a dedicated filter for the Deo-Toilet deodorizing fan. Do not use it for any other purpose. ● Please take the filter out of the bag before use. You may notice a slight odor immediately after removing it from the bag, but this does not affect its performance. ● Do not force the filter when installing it. ● There is no front or back to the filter, but do not flip it over during use. Flipping it over during use may cause dust and pet hair attached to the filter to be released into the room. ● White streaks may appear on the surface of the filter, but this does not affect the product's quality. ※ This product is not edible. If swallowed, consult a doctor or veterinarian. ※ The filter is a consumable item. Do not wash it or reuse it by vacuuming it. 【Main Materials】 Deodorant: Activated carbon, polyester fiber / Surface material: Polyester non-woven fabric / Binding agent: Hot melt adhesive