Filter Upgrade Kit- Attix 30/50 XC - fits the Attix 30 and Attix 50 models with the Extreme Clean (XC) self-cleaning filter system. These are washable PET-fleece filters. Nilfisk upgraded the early production models with new filter elements and support cages (see pics). Later models already use these filters but purchase of the kit will give you some new hardware at a deeply discount price. 2 kits left in stock.