1. new, high-quality materials, well-made, durable, and highly matched with the equipment. 2. Clean accessories keep your home robot at performance. Accessory contents are easily removed and replaced as part of routine maintenance. Also reduces dust, pollen and other from seeping into the air you breathe. 3. In order to achieve the best cleaning and filtering effect, the cleaning accessories should be replaced every 2-3 months according to the frequency of use. 4.HEPA filter can greatly improve air quality and reduce particle size by up to 99.97%. Helps remove household dust, pet dander, etc. 5. Say goodbye to odors, pre-filters can help reduce unpleasant odors from pets, smoke, cooking fumes and household products and chemicals. Colour:As shown Material:plastic Package Contents: 4 x filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.