LifeSupplyUSA Humidifier Filter for Graco 1.5 Gallon fits Graco 2H00 and TrueAir 05510 Replaces Part # 2H01 for Graco # 2H00, 2H01, 2H001 & TrueAir # 05510. Also fits Graco Cool Mist Humidifier. This humidifier filter is manufactured to prevent growth and migration of mold, fungus, algae, and bacteria. Replaces part # 2H01 Brand New Individually Sealed Designed & Engineered by LifeSupplyUSA