This filter pack is specially designed to fit your ELECTROLUX vacuum cleaner Aptica ZTT 7900…7999. ELECTROLUX has created this filter pack to maintain the good performance of your Aptica vacuum cleaner. These high quality filters provide your vacuum cleaner with high airflow and strong suction power as well as a high filtration level and maximum dust retention. The Hygiene filter offers a healthier home. Particles vacuumed by the cleaner are efficiently filtered and retained by the Hygiene filter. To ensure the best performance of your vacuum cleaner, filters should be replaced at least twice a year or when they become visibly soiled. Use of non genuine filters may adversely affect your vacuum cleaner performance. This filter pack contains one Hygiene filter, one inner filter washable and one outer filter washable. ELECTROLUX filter pack reference: EF 136.