Package includes: 78.7 inches x 39.3 inches residential vent filter*1 (Dimensions measured manually; slight variations may occur but do not affect performance.) Why choose us: 1. Honkador's specialized electrostatic filtration technology captures fine particles to reduce indoor dust. Ideal for those sensitive to dust, pet dander, and similar irritants. 2. Flexible DIY design allows trimming to fit all sizes of vents, air outlets, and grilles. 3. Improves air quality by 50-60%. You can also add a few drops of your favorite essential oil to our filter for a pleasant scent and fresh air throughout your home. 4. Protects your vents. 5. Prevents direct airflow from AC units causing discomfort. 6. Reduces fan noise. Compatibility: Fits all sizes of vents, air outlets, and grilles. Total filter dimensions: 78.7 inches x 39.3 inches. Easily trimmed to fit multiple locations based on your needs. Discover the many ingenious uses of Honkador filters. Upgraded Material: Crafted from premium polyester fiber, our vent filters feature tightly woven fibers that enhance airflow while reducing dust and unpleasant smells. High-Efficiency Dust Removal: Our vent air filters effectively reduce indoor dust. Breathe easier and enjoy fresher air instantly! Easy Installation: 1. Measure the vent opening. 2. Cut to fit any vent size. 3. Trim and attach the mounting strip to the vent. 4. Install the filter into the vent. 5. Replace the filter every 1-2 months or as needed. This vent filter fits all home vents, including floor, wall, and ceiling vents. Install inside or outside—internal installation looks neat, while external installation allows easy replacement. Both effectively filter dust. (Clean the vent with a damp cloth before installation.) Why replace filters regularly: 1. You live near major roads or industrial facilities. 2. You have a newborn or are pregnant. 3. You have pets. 4. You are in excellent health. Premium Service: We are committed to creating the best vent filters, ensuring your family breathes the cleanest air. If you have any questions about our products, please contact our professional team. We guarantee your shopping experience. Package includes: 78.7 inches x 39.3 inches residential vent filter*1 (Dimensions measured manually; slight variations may occur but do not affect performance.) Why choose us: 1. Honkador's specialized electrostatic filtration technology captures fine particles to reduce indoor dust. Ideal for those sensitive to dust, pet dander, and similar irritants. 2. Flexible DIY design allows trimming to fit all sizes of vents, air outlets, and grilles. 3. Improves air quality by 50-60%. You can also add a few drops of your favorite essential oil to our filter for a pleasant scent and fresh air throughout your home. 4. Protects your vents. 5. Prevents direct airflow from AC units causing discomfort. 6. Reduces fan noise. Compatibility: Fits all sizes of vents, air outlets, and grilles. Total filter dimensions: 78.7 inches x 39.3 inches. Easily trimmed to fit multiple locations based on your needs. Discover the many ingenious uses of Honkador filters. Upgraded Material: Crafted from premium polyester fiber, our vent filters feature tightly woven fibers that enhance airflow while reducing dust and unpleasant smells. High-Efficiency Dust Removal: Our vent air filters effectively reduce indoor dust. Breathe easier and enjoy fresher air instantly! Easy Installation: 1. Measure the vent opening. 2. Cut to fit any vent size. 3. Trim and attach the mounting strip to the vent. 4. Install the filter into the vent. 5. Replace the filter every 1-2 months or as needed. This vent filter fits all home vents, including floor, wall, and ceiling vents. Install inside or outside—internal installation looks neat, while external installation allows easy replacement. Both effectively filter dust. (Clean the vent with a damp cloth before installation.) Why replace filters regularly: 1. You live near major roads or industrial facilities. 2. You have a newborn or are pregnant. 3. You have pets. 4. You are in excellent health. Premium Service: We are committed to creating the best vent filters, ensuring your family breathes the cleanest air. If you have any questions about our products, please contact our professional team. We guarantee your shopping experience.