HiKOKI 6690347 Cleaner Element for a wide range of compatible Hitachi and HiKOKI petrol brush cutters, grass trimmers and pole hedge trimmers. This replacement air filter element helps prevent dust, dirt and debris from entering the engine through the air intake, helping maintain reliable engine performance. Suitable for replacing a dirty, worn or damaged original filter and manufactured to the correct specifications for precise fit. Part 6690347 replaces the previous part number 446-00025-20.