This bag and filter pack is created to fit the ELECTROLUX vacuum cleaners: Compact Power Z 2600, 2604, 2605, 2630, 2631, 2640, 2650, 2651, Harmony Z 2520, 2530, 2550, Ingenio Z 2500 series, Modern Day. ELECTROLUX high quality synthetic bags have been designed to maintain the best performance of your vacuum cleaner. Synthetic bags last longer than ordinary paper bags, they provide better filtration, have a greater capacity and are more resistant. The motor filter protects your vacuum cleaner motor from dust particles. The optimised cleaning performance of your cleaner helps make your home a healthier place. We recommend you to change vacuum bags regularly and replace the motor filter with every 4th vacuum bag change. All filters should be replaced at least twice a year or when they become visibly soiled. This pack includes 4 synthetic vacuum bags and one motor filter. ELECTROLUX bag and filter pack reference: ES 39.