Jarden Consumer-Domestic Hwf75pdq-U Extended Life Circular Humidifier Filter - Quantity 4 Humidifier, Chemical & Accessories
Replacement wick filter for Holmes humidifiers:HM-3500, 3600, 3640, 3650, 3655-White Westinghouse: WWHM3300, WWHM3600. Filter features antimicrobial product protection that kills 99.0% of bacteria.