SCOPE OF DELIVERY: 1 high-quality filter cassette without additional lock, insert the cover and close it, the vacuum cleaner suction ensures safe operation. Seat of the filter unit Suitable for dry vacuuming of dust classes L and M, i.e. light to medium-duty suction materials PERFORMANCE: Due 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 sufficient air supply, clean air circulation, and optimal protection of your motor. RECOMMENDED: We recommend changing the filters regularly. For full suction power, optimal filtration of the exhaust air, and less motor effort. Recommendation: Tap or blow carefully. Washing is a myth and can clog the pores and impair performance. A seemingly clean filter can have a negative impact on its operation and put strain on the engine.