All the great design features of the standard filter in a High Efficiency Particulate Air Filter (HEPA). Designed for performance, durability and convenience.
- HEPA filters capture 99.997% of particles 0.3 microns in diameter or larger
- Square filter geometry makes dust less likely to get trapped high suction power is maintained
- Cartridge design makes filter installation extremely easy
- High-performance replacement filters for Bosch 3931 and 3931A vacuum cleaners
- Not for use when vacuuming wet materials