General description High-quality roller brush and HEPA filter accessories designed for models 3930F, 3933, 3999z, 4017N, and V2 OmniForce Edge Wet Dry Cleaner. These parts effectively filter fine dust, reducing dust, pollen, and other allergens from the air you breathe. Technical specifications Material: Plastic Package Contents: 1 x roller brush, 4 x HEPA filters Measurement allowed error: +/- 1-3 cm Usage For optimal performance, it is recommended to replace the spare parts every 2 to 3 months as part of normal maintenance. The filters can be easily removed and replaced.