5-Pack Replacement Holmes HM3500 Humidifier Filter - Suitable Holmes HWF75, HWF72 Air Filter

Replacement Holmes HM3500 Humidifier Filter - Quantity, 5 Replaces Holmes HWF75, HWF72 Air Filter Traps Water Impurities & Dissolved Solids Before They Become Airborne For best results, change air filter at least once per season or more often depending on air Grade and use. Essential for Allergy Sufferers.