Filter can maintain the cleaning performance of the sweeper while reducing the penetration of dust, pollen and pet hair into the air you breathe. Replacing the accessories regularly will also improve the cleaning performance and suction of your vacuum cleaner. Also can help to provide you with fresh air and healthy living environment. Suitable for LG CordZero A9 Vacuum Cleaner SERVICE: If you have any questions about your order, please feel free to contact us directly and we will get back to you within 24 hours.