Our Goal is Keep Your Home Smelling Fresh and Clean with our Activated Carbon Pre Filters! VEVA believes that clean air is a core part of your health and happiness. VEVA places the customer's interest first by focusing on providing high-quality air filters at the most affordable prices. Pet owners, smokers, people suffering from asthma or allergies trust VEVA for their needs to remove odors, smells, allergens, dander, pollen, pet hair, dust or smoke from their homes. ► INCREDIBLE VALUE IN EACH PACK - With 12 pre-filters in every pack, this may last up to 1 year for each filter depending on your usage. Lower quality replacement filters allow dust & particles to escape into your main HEPA filter which is costly to replace. ► SUPER FAST INSTALLATION - No more time consuming cutting and measuring you’ll have your machine running in a matter of minutes. These are specially cut and designed to fit HW HPA 200, 202, 204, and 250B Air Purifiers. Pre Filter Dimensions: 11.25" x 13.9" x 0.2”. CUSTOMER HAPPINESS: Our responsive customer service team is fully committed to ensuring you have the best experience possible! If you have any questions or concerns, please contact us and we will answer ASAP!