Our HEPA Air Purifier Filter and Activated Carbon Replacement Compatible with Winix 114090 Filter D for 9300 Air Purifier is a high-quality product manufactured in our own factory. With its advanced technology, it effectively removes pollutants and allergens from the air, making your atmosphere cleaner and healthier. The HEPA filter captures 99.97% of small particles, while the activated carbon filter removes unpleasant odors. This cost-effective and environmentally-friendly product is designed to enhance the performance of your Winix 9300 Air Purifier. Our factory guarantees the quality and durability of this product.