Material: Plastic Quantity: One The filter can effectively block a variety of dust and keep your vacuum cleaner running at high performance. Easy to clean, washable and reusable, easy to disassemble and replace. It is fully washable and reusable, has a longer service life and better filtering effect, making your vacuum cleaner more durable. Pack with 1 filter. Regular cleaning and replacement of the filter can maintain perfect performance and extend the life of the vacuum cleaner. Therefore, if you use it frequently, we recommend replacing the filter every 1 to 3 months to ensure good air.