General description vhbw offers a set of two high-quality cartridge filters designed for standard, wet, or multipurpose vacuum cleaners. These filters are essential for maintaining maximum dust extraction and ensuring clean exhaust air. Regular replacement of the filters not only prolongs the life of your vacuum cleaner but also helps maintain its suction power. Technical specifications External diameter: 19 cm Internal diameter: 14.5 cm Height: 16.5 cm Form: round Colour: blue / yellow Compatible with wet & dry vacuuming Compatibility and accessories Compatible with Herkules Aqua Steel 40 Compatible with Aqua Steel 50 Compatible with Herkules 3000 Compatible with Herkules 3001 Compatible with Herkules 4001 Replacement for part numbers: 2351110, 6.904-170.0, 3.752.0032, 6.904-042.0, 72800205, NT RU-30.1, RU-30.1 Installation These filters are designed for precision-fit, allowing for easy installation and removal. Regular changes are recommended to protect the motor and maintain