Humidifier Replacement Filter fits for Holmes HWF64 Filter B Key benefits Restores humidifier performance: replaces worn or clogged media so the unit can operate as intended. Correct fit and size: precisely sized at 19 1/4 in L x 6 1/2 in W x 1 1/4 in T for direct replacement of the HWF64 Filter B. Simple to install: onepiece design allows quick swapin replacement without tools or modification. Single replacement pack: includes one humidifier filter for immediate use. What this filter does This replacement filter is designed to act as the evaporative media for compatible humidifier models. It provides the correct dimensions and form factor to restore proper airflow and moisture delivery when the original filter has reached the end of its service life. Compatibility and contents Fits models: Fits for Holmes HWF64 Filter B Package includes: 1 x humidifier filter Practical applications Seasonal maintenance: the filter before winter or dry seasons to maintain consistent humidifier operation. Bedroom or office use: swap in a fresh filter to keep a humidifier running efficiently during daily use. Spare or backup: keep a replacement on hand for quick changeouts during extended operation or scheduled maintenance. Notes Verify the listed dimensions before to ensure compatibility with your humidifier model. This product is sold as a single replacement filter for models that accept HWF64 Filter B replacements.