Festool 500558 CT SYS Main Filter Element is a standard 1-micron filter designed to effectively capture fine wood dust particles. Wood dust is notoriously difficult to remove once airborne, but using tools equipped with dust extraction features can significantly reduce its presence. This filter works when paired with a high-quality dust extractor that proper filtration, helping to eliminate most dust at the source before it spreads into your workspace. Engineered to trap particles as small as 1 micron, it maintains optimal airflow, allowing the filter to reach full capacity without clogging or caking. This ensures consistent performance and a cleaner environment during your woodworking projects. Model Number: 500558