2 Pack Replacement Side-Brushes for Karcher S 6 twin - Ideal for Wet Conditions Not compatible with Karcher S 4 Twin or KM 70 Models The side brushes with a bristle made of standard bristles and 3 times harder bristles are ideal for loosening and sweeping damp sweeps 2 Pack Bristle Brushes Great for cleaning Concrete, Pavements, Roads, Sidewalks, Driveways, Garages and other areas around the house