Check the listing for details. 4'' Silent Exhaust Inline Duct Fan Ventilation Blower Fan Air Circulation 110V. Color: Black, Condition: New, Made in China. Listed at 52.41 USD. Description Are you still worrying about these problems? The bathroom has a strong odor, the air in small spaces is difficult to circulate, and the formaldehyde left over from decoration will be harmful to health. Look at our air duct fan. It is made of PP, with good toughness and impact resistance. In addition, it has a high protection grade (IP2X) and a low working decibel of 30dB, so you can use it confidently for a long time. Key Features High-quality Material: Premium PP makes this product sturdy, wear-resistant, heat-resistant, and durable, so it can remain practical and beautiful and can be used on many occasions. Fresh Life: This item is designed to remove exhaust gases, help ventilation, and keep your living space cooler and more comfortable year-round. With it, you can enjo.