Think Crucial 4 Replacement for Dirt Devil F13 HEPA Style Filter & Foam Pre-Filter, Compatible with Part # 3LK0540001, Washable & Reusable HIGH QUALITY AIR FILTER that can replace your Style F13 Dirt Devil Filter. Get back to having a clean air to breathe again! Fits Reaction Dual Cyclonic, Reaction All-Surface, Reaction Fresh, and Action Vacuums. HEALTHIER LIFESTYLE! No one wants breathe dirty air in their home and if you don't clean your air filter that will be exactly what you'll be doing! Replacing your filter will help clean your air purifier's air and allow for a healthier lifestyle! This filter helps keep our household dust, pollen and mold spores. EASY TO INSTALL so you can get back to cleaning as soon as possible! Simply remove your old filter and put this brand new one in it's place! Replaces Dirt Devil Part No. 3LK0540001 Filters. SAVE MONEY by using a new air filter! When your air purifier has a clogged or dirty air filter it 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 Think Crucial 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!