Holmes Arm and Hammer Air Purifier Booster Filter, 4 Pack Filter is enhanced with Arm and Hammer Baking Soda to absorb and eliminate odors that come from pets, nurseries, kitchen, garbage, or litter boxes Includes a resealable bag For use with Holmes air purifier models: HAP2400, HAP242, HAP412, HAP422, HAP424, HAP1200, HAP706 or HAP716 Also works on Bionaire purifier models BAP260, BAP815, BAP825, BAP1412, BAP1502, BAP1525, BAP1700 and BAP8500 Cannot be used independent of the main purifier filter Filter is enhanced with arm and hammer baking soda to absorb and eliminate odors that come from pets, nurseries, kitchen, garbage, or litter boxes Cannot be used independent of the main purifier filter Includes a resealable bag For use with Holmes air purifier models: HAP2400, HAP242, HAP412, HAP422, HAP424, HAP1200, HAP706 or HAP716. Also works on Bionaire purifier models BAP260, BAP815, BAP825, BAP1412, BAP1502, BAP1525, BAP1700 and BAP8500 Filter is enhanced with Arm and Hammer Baking Soda to absorb and eliminate odors that come from pets, nurseries, kitchen, garbage, or litter boxes