Think Crucial 9 Replacements for Nutone 391 Bags Fit Central Vacuums, Compatible With Part # 391 HIGH QUALITY BAGS that can replace your existing Nutone Central Vacuum bags. The bags filter the air so you can have clean air to breathe again! Compare to Nutone Part No. 391. HEALTHIER LIFESTYLE! No one wants breathe dirty air in their home. Replacing your bags on a regular basis ensures that your carpets get cleaner and the vacuum exhaust is filtered. EASY TO INSTALL so you can get back to cleaning as soon as possible! Simply remove your old bag, toss it, and put this brand new one in it's place! Fits Nutone Central Vacuum CV350, CV352, CV353, CV450, CV653 & CV750 Series. SAVE MONEY by using a new bag! When your vacuum has a full bag, air can't circulate as easily through the vacuum. This can cause it to work harder which will end up hurting your electric bill! GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Crucial Vacuum warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!