AEG has specially designed these synthetic vacuum bags to ensure the best performance of your AEG vacuum cleaner Smart 450...487 and Smart 3306. Synthetic bags last longer than ordinary paper bags. They have a greater capacity, provide better filtration and are more resistant. Optimised cleaning performance of your vacuum cleaner helps make your home a healthier place. We recommend that vacuum bags should be changed regularly and filters should be changed every 4 bags. All filters should be replaced at least twice a year or when they become visibly soiled. This kit includes 4x synthetic vacuum bags, 1x micro filter and 1x motor filter. AEG bag and filter pack reference is GR 51S.