A premium humidifier wick filter designed by Nispira. 4 filters included Fits Holmes, Sunbeam, and Bionaire Humidifiers requiring Filter "D" Compatible with Holmes HM-3500, 3600, 3640, 3650, 3655.
White Westinghouse: WWHM3300, WWHM3600 Also compatible with Sunbeam SCM3609, SCM3755C, SCM3501, SCM3609P, SCM3657, SF221, SCM3502. Bionaire W2, W6, W7, W9, W12, W14, W15, W25, BCM600, BCM700, BCM2200, BCM3600, BCM3656, BCM3855, BCM3955, BCM4600, BCM5520, BCM5521, BCM5555, BCM6000 BCM7203, BCM7305, BCM7306, BCM7510