1. , high-quality materials, well-made, durable, and highly matched with the equipment. 2. Clean accessories keep your home robot at peak performance. Accessory contents are easily removed and replaced as part of routine maintenance. Also reduces the infiltration of dust, pollen and other allergens into the air you breathe. 3. In order to achieve the best cleaning and filtering effect, cleaning accessories should be replaced every 2-3 months according to the frequency of use. 4. The HEPA filter can greatly improve the air quality and reduce particle size up to 99.97%. Helps remove household dust, pet dander, and more. 5. Say goodbye to odors, the pre-filter can help reduce unpleasant odors from pets, smoke, cooking fumes, and a variety of household products and chemicals. Colour:green Material:plastic Package Contents: 2 x Purifier 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.