General description vhbw offers a set of 4 replacement filters designed for Nilfisk Alto Attix vacuum cleaners, including models 50-0H PC, 50-21 XC, 50-21-PC, 40-21 XC, and 50-01 PC. These filters are essential for maintaining optimal suction capacity and ensuring clean air is returned to your environment. Regular filter changes (every 6 to 12 months) are recommended to protect the motor from dust and to create a dust-free, pet-hair-free space, making it ideal for allergy sufferers. Technical specifications Dimensions (L x W x H): 23.6 x 11.1 x 3.8 cm Material: plastic / fabric Form: rectangular Colour: black / white Weight per filter: 101 g Replacement cycle: approx. every 6 - 12 months Compatibility and accessories Compatible with Nilfisk Alto Attix models: 50-0H PC, 50-21 XC, 50-21-PC, 40-21 XC, 50-01 PC Replacement for part numbers: 778805, 302002842 Installation Quick & easy installation