SCOPE OF DELIVERY: 1 high-quality filter cassette without additional lock, insert the lid and close it, the vacuum cleaner's suction ensures safe operation. Filter unit housing Suitable for dry vacuuming of dust classes L and M, i.e. light to medium-weight vacuumable materials PERFORMANCE: Thanks to its nature and structure, the innovative filter material offers a large attack surface for dust and dirt and, thanks to its air permeability, ensures adequate air supply, clean air circulation and optimal motor protection. RECOMMENDATION: We recommend replacing the filters regularly. For full suction power, optimal filtration of the exhaust air and less motor strain. Tip: Tap or blow carefully. Washing is a myth and can clog pores and impair performance. A seemingly clean filter can negatively impact its operation and put a strain on the engine.