The Festool 493334 HEPA Filter Element works with the CT 11, CT 22, and CT 33 Dust Extractors. The 493334 HEPA Filter Element filters out 99.99% of particles down to 0.3 micron size for a clean and safe working environment.
Filters out 99.99% of particles down to 0.3 micron size
(2) HEPA Filter Elements
Filtering Out Harmful Particles During Dust Collection