Optimus U-30002 Replacement Warm Mist Humidifier Absorption Sleeve for U32000, U-32010 ad U-32030, 3-Pack Replacement absorption sleeve for warm mist humidifier Fits Optimus model U-32000, U-32010, U-32030 and Kenmore models #15123 and #15125 Filter helps protect against bacteria and mineral build-up on the unit Prevents the noisy gurgling sound to help you sleep more soundly at night Pack contains 3 filters