General description Made of high-quality composite materials, this HEPA filter is designed to effectively capture fine dust, pollen, and other allergens, ensuring cleaner air in your environment. It is 100% new and of high quality, making it an essential component for maintaining the performance of your Mi Air Purifier 4. Technical specifications Material: Composite materials Dimensions: Measurement allowed error is +/- 1-3 cm Installation Easy to remove and replace as part of normal maintenance. Usage It is recommended to replace the filter every 2 to 3 months to maintain optimal performance of the air purifier. Other information Package Contents: 1 x HEPA filter Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.