Function: Reduces dust, pollen and other allergens in the air you breathe. Improved cleaning efficiency: This filter element improves the cleaning efficiency of your robot vacuum cleaner. Easy to use: These filters are easy to remove and replace as part of routine maintenance. HIGH-QUALITY MATERIAL: The vacuum cleaner filter element is made of plastic material and is durable. Scope of application: Specially designed for Dibei D18 D008Pro vacuum cleaner, with better cleaning effect. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.