Made with a HEPA filter to effectively filter dust and prevent secondary pollution. Effectively filters dust, smoke and other pollutants to keep the air fresh. Prevents large dust particles from entering the motor room and damaging the motor at high speeds, thus ensuring the life of the vacuum cleaner. HEPA washable, it is recommended to replace the filter element every 3 months for best results. Compatible with Electrolux Vacuum Cleaner Accessories, Filter Element, HEPA Filter, FC9302 9304 FC9171 ZE346B; the same size can also be used universally (150 x 120 x 25 mm). 1. Outer frame dimensions: 15cm x 12cm x 2.5cm; inner frame dimensions: 13.72cm x 10.84cm x 2.12cm. 2. Washable material: reusable filter. 3. Replacement filters for Philips Electrolux cleaning robots. 4. The filters maintain the robots cleaning performance while reducing the infiltration of dust, pollen and other allergens into the air you breathe. 5. For best results, filters should be replaced every 1-3 months. 6. A practical accessory, a good helper for home cleaning and sanitation. Compatible with the following models: For Electrolux: ZUA3840P, ZE346B, Z3347, ZU3375, US3940P, ZE360WP, ZSC69FD2, ZSC6940, ZUAG3801, ZUA3940P, ZUSG3901, ZSC6940. Scope of delivery: 2 Hepa filters.