• HEPA filters capture 99.997% of particles 0.3 microns in dia. or larger
• Square filter geometry makes dust less likely to get trapped High suction power is maintained
• Filters stay in the vacuum cleaner even when wet vacuuming
• Cartridge design makes filter installation extremely easy
• High-performance replacement filters for Bosch 3931 Vacuum Cleaner
  
• Includes:

Package contains 2 filters