General description Set of 3 filter elements compatible with Nilfisk Alto Wap 550-21, 550-31, and 590-31 battery-powered vacuum cleaners. These filters are designed for both dry and wet vacuuming, making them ideal for cleaning wet rooms. They are precision-fit for easy installation and removal, ensuring efficient suction power when replaced regularly. Technical specifications Height: 12 cm Outer diameter: 18 cm Inner diameter: 13.4 cm Form: round Weight: 253 g Colour: white / blue Washable Compatibility and accessories Compatible with Nilfisk Alto Wap 550-21 Compatible with Nilfisk Alto Wap 550-31 Compatible with Nilfisk Alto Wap 590-31 Replacement for W29747, R640, 488461, 29747 Usage Regularly changing the filters ensures optimum suction performance and extends the service life of your vacuum cleaner motor. These high-quality filters are perfect for vacuuming damp and dry dirt in households, garages, and workshops.