All filters in your vacuum have an essential function. The motor filters are used to trap any harmful particles that may enter your vacuum before reaching the motor to keep that free from damage. It\'s recommended you change your filters every 6 months, or when they become visibly soiled, to maintain the functionality of the vacuum. High quality dust filter AEG has specifically designed high quality filters to protect your vacuum cleaner’s motor from dust particles. High grade filter material The high grade of material, used for our genuine bags and filters, provides your vacuum cleaner with strong airflow and high suction power as well as a high filtration level and maximum dust retention. Contains: 2 original universal motorfilter to cut Compatibility with AEG Vacuum Cleaners Genuine motor filter to cut for AEG vacuum cleaners : Air Max/GREEN, Clario, Ergo Space/GREEN, Oxygen+, Jet Maxx/GREEN, System Pro, Ultra Active/GREEN, Ultra Silencer/GREEN, Ergobox, Excellio etc. For optimum performance your dustbag should be changed regularly and your filters should be changed every 5 dustbags. All filters should be replaced at least twice a year or when they become visibly soiled. Use of non original AEG dustbags and filters may adversely affect the performance of your vacuum cleaner.