It is made of filter fabric and can effectively filter dust and prevent secondary pollution. Effectively filters dust, smoke and other pollutants to keep the indoor air fresh. < p>Prevents large dust particles from entering the cabin and damaging the high-speed motor, ensuring the service life of the vacuum cleaner. It is recommended to replace the filter every 3 months for best results. Dimensions: 150 x 120 x 25 mm Note: The data is all measured manually, please allow 1-3 cm error due to light and display differences, there may be color differences, please refer to the actual item received.