Product details:
Improve your indoor air quality with this Castle Filter, 20 inch x 36 inch. It has a large surface area to trap dust and other particles, and it can hold up to 40 grams before needing to be replaced. The Castle air filter protects against mites, dust, pollen, pet dander, bacteria and mold. It contains biodegradable foam air filter oil and is designed to provide superior filtration and enhanced airflow.