Genuine paper bags are designed to fit ELECTROLUX vacuum cleaners: 300 Series Z 302, 303, 305, 307, 310, 312, 319, 324, 331, 337. ELECTROLUX high quality paper bags have been created to fit your 300 Series vacuum cleaner and maintain its best performance. The high grade of material used for these paper bags provides your vacuum cleaner with high airflow and strong suction power as well as a high filtration level and maximum dust retention. We recommend you change the paper bags regularly. The use of non genuine vacuum bags may adversely affect your vacuum cleaner performance. This pack contains 5 paper bags. ELECTROLUX paper bags reference: E 4N.