HQRP 6-Pack Humidifier Wick Filter for ProCare PCCM-832N Cool Mist Humidifier, AC813 PCWF813 PCWF813-24 Replacement Coaster HQRP&reg; 6-pack Wick Humidifier Filter Replacement plus HQRP&reg; Coaster; Removes particles from water; Helps prevent the growth and migration of mold, fungus, algae and bacteria; Replaces Part # WF813; Measures approximately 3.75" x 5.5" x 1.5"; Replace your filter every 1 to 3 months for optimal performance; Compatible with Original filter; 2 weeks DOA replacement warranty!