Efficient. Clean. Protects your health. The main filter made of cellulose fibre material is suitable for vacuuming fine dust and coarse dirt of dust classes L and M. This enables work to be carried out efficiently, cleanly and systematically and reduces hazards to health. Dust-free. For vacuuming mineral and wood dusts|Filter dusts of dust classes L and M|Flat fluted filter with restraint value of 99.9%. Filters residual dust not retained by the filter bag so that clean air is directed back into the room|For vacuuming fillers and lacquer as well as wood dusts. for vacuuming dusts posing a medium hazard in dust classes L and M|FSC™-certified. for CT 11, 22, 33, 44, 55