Humidifier Filter for Holmes HWF75PDQ-U HWF75 (2-Pack) Aftermarket Product Sourced Exclusively by EFP - Exact Fit Parts High Quality Humidifier Wick Filter for Holmes HWF-75, HWF75 High Quality Humidifier Replacement Filter for Sunbeam SCM 3609, SCM3609P, SF221, SF-221 High Quality Humidifier Wick Filter Filter for Honeywell HCM-6009, HCM6009; Bionaire Models W12, HM-3400, W15, W14 Approximate Measurements: 7 3/4" Tall x 1" Thick x 29" Circumference