Original washable filter, washable inner filter & washable outer filter designed for vacuum cleaner models AEG Aptica: ATT 7900...7999. AEG has specifically designed high quality filters to fit your vacuum cleaner and maintain its best performance. The high grade of material used, provides your vacuum cleaner with strong airflow and high suction power as well as a high filtration level and maximum dust retention. (High Efficiency Particulate Air) filters offer a healthier home particles vacuumed by your cleaner are efficiently filtered and retained by the filter. For optimum performance of your vacuum cleaner, all filters should be replaced at least twice a year or when they become visibly soiled. Use of non original AEG filters may adversely affect the performance of your vacuum cleaner. This kit contains: 1x AEG washable filter, 1x washable inner filter and 1x washable outer filter.