Graco 1.5 Gallon Humidifier Filter. Designed by FilterBuy to fit Graco 2H00 and TrueAir 05510. Replaces Part # 2H01. Graco 1.5 gallon Humidifier Replacement Filter. Designed by FilterBuy to fit Graco # 2H00, 2H01, 2H001 & TrueAir # 05510. Also fits Graco Cool Mist Humidifier. Replaces part # 2H01. This humidifier filter is manufactured to prevent growth and migration of mold, fungus, algae, and bacteria. Premium aftermarket replacement, designed by FilterBuy in the USA. Humidifier FilterBuy: Breathe Better!