1. This vacuum cleaning filter is replaced by environmentally friendly materials, and excellent performance. Its soft texture ensures that it is very suitable and not cause any damage to your vacuum cleaner. 2. It is easy to install these filters; they are designed for fast installation and disassembly to save your time and energy. You don't need extra tools or excessive strength, you can easily update regularly. 3. The filter element of a vacuum cleaner regularly can significantly extend the service life of the device. By maintaining the best function, these filters can that your vacuum vacuum cleaner runs at the best efficiency, thereby saving possible expensive maintenance. 4. The filter kit is designed to capture fine particles to help maintain a cleaner family environment. They effectively capture dust, dirt, and other allergens, which are ideal choices to houses that improve indoor air quality. 5. This filter group is suitable for CY18/CY22/CY23/CY25/DY75/DY77/DY78 to perfect