Replace Frequency: To maintain good performance, we recommend cleaning the filter once a month and replacing it every 3 months. Cleaning set made of high strength material and environmental protection. Replacement filter suitable for battery vacuum cleaner for Kobold VC100 spare parts. EASY TO INSTALL: The device can be opened with a light twist, so you can easily open the filter and perform a simple replacement.Snaps into place for quick and effortless replacement, no tools required. Compatible Model: This replacement filter is ONLY compatible with for VC100 Cordless Vacuum Cleaner (Confirm your robot model before purchase) Easy to remove and replace as part of routine maintenance, highly match with the equipment.Replacing your filter regularly also improve the cleaning performance and suction of your vacuum cleaner. spare parts to maintain and upgrade your vacuum cleaner.