Riccar A Micro Filtration Bag, 12 Bags Treated with Ultra-Fresh for Models RAH-6, C13-6, C13-12, CMH-6, 2000, 4000, S6-3, S6-12, 5000 and 6000 RICCAR Vibrance, R-Series, 4000 Series, 2000 Series, 1600 Series, 1200 Series and 4-5AE Uprights; SIMPLICITY Symmetry (5000, 6000 Series) Uprights Micro Filtration vacuum bags also capture 99% of particles 5 microns in size, including household fibers and other microscopic allergens The Ultra-Fresh finish on these bags protect against odor and stain-causing microbial growth; This helps keep your bag cleaner and fresher Ultra-Fresh treated bags are guaranteed from defects