Designed specifically for use with the Miele 3-in-1 Stick vacuum, this HEPA filter captures and retains allergens and lung-damaging particles as tiny as 0.3 micron, providing a cleaner home and healthier air. For use with the Miele 3-in-1 Stick vacuum. Retains 99.99% of allergens and particles, down to 0.3 micron. Helps purify ambient air. Tightly sealed system keeps particles contained. Use filter with the Miele Quickstep Vacuum.