4-Pack Replacement 2H00 Humidifier Filter for 1.5 Gallon Graco TrueAir - Compatible with Graco Cool Mist Humidifier, Graco 2H00, Graco 2H01, TrueAir 05510, Graco 2H001 4-Pack Replacement 2H00 Humidifier Filter for 1.5 Gallon Graco TrueAir - Compatible Graco Cool Mist Humidifier, Graco 2H00, Graco 2H01, TrueAir 05510, Graco 2H001 Replaces Graco 2H00 Humidifier 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 quality and use. Essential for Allergy Sufferers. On Sale for a Limited Time!