The Holmes APF-7 is the correct foam air cleaner pre-filter for the following air purifiers:
The Holmes Foam Air Cleaner Prefilter 2 pack APF-7 is used to remove contaminants and large particles from the air with Holmes HAP300 and Holmes HAP3004 Air Purifier systems. The Holmes APF-7 arrives in a 2 pack and is a foam carbon prefilter that helps to extend the life of the HEPA carbon filter.
The Holmes APF-7 Carbon Pre-Filter (2 Pack) specifications:
Holmes air purifiers are very effective at reducing airborne allergens, particles, odors and pathogens.