Genuine dust bags for Electrolux vacuum cleaners 4X4 Z4440 & Z4460, DOLPHIN Z 810, Z 811, Z 820...861, Z 2200...2265/A, Z 3820...3870. Our high quality bags have been specifically designed to fit your vacuum cleaner and maintain its best performance. The high grade material provides strong airflow and high suction power as well as a high filtration level and maximum dust retention. For optimum performance of your vacuum cleaner, we recommend you change paper bags regularly and replace all filters at least twice a year or when they become visibly soiled. This pack includes 5x disposable paper dust bags and 1x micro filter to cut. Electrolux dust bags reference also known as E13, E14 and E25.