Fits Models:
Holmes Humidifiers: HM-850, HM-3300, HM-3400, HM-3500, HM-3501, HM-3600, HM-3607, HM-3608, HM-3640, HM-3641, HM-3650, HM-3655, HM-3656, (HWF-75, HWF75CS, HWF-75CS, HWF75PDQU, HWF75PDQ-U).

Also Fits:
Bionaire Humidifiers: W-12, W-12-UC, W-14, W-15, (BWF-1500), BCM-3656.
Sunbeam Humidifiers: SCM-3501, SCM-3502, SCM-3609, SCM-3656, SCM-3657 (SWF-75, SF-221)
Touch Point Humidifiers: S120E-A, S120E-C
White Westinghouse Humidifiers: WWHM-3300, WWHM-3500, WWHM-3600 (WWH-35).

Features:

• Patented Expanded Life reinforced filter for extended life and efficiency.
• Micro-Free antimicrobial treatment helps protect wick filter from the growth and migration of mold, fungus, algae and bacteria.
• Approximate Dimensions: 10" Dia x 7 3/4 H"

Replace every 2 months for optimal performance.