General description vhbw offers a set of 3 round filters designed for various vacuum cleaner models, including standard, robotic, wet, and multipurpose types. Regular replacement of these filters is essential for optimal dust extraction and motor protection against impurities, which in turn enhances the vacuum cleaner's service life and maintains high suction power. Technical specifications Outer diameter: 320 mm Height: 12.4 cm Largest width: 32 cm Material: plastic / microfleece Form: round Colour: black / white Weight of each filter: 134 g Compatibility and accessories Compatible with: Numatic AVQ-250, BX 190, 2B/C, AVQ 380, BX 390, Charles CVC370, CT470, 1B/C, DBQ 250, Charles CVC370-2 Replacement for: 604115, 604165 Usage It is recommended to change the filters when the vacuum cleaner's cleaning efficiency decreases, typically every 6 to 12 months.