This Wolf Internal Blower is the perfect addition to your Wolf ventilation kitchen hood. It features a single-wheel design and an exhaust air power of 500 CFM, making it a powerful tool to keep your kitchen smoke and odor-free. The blower is designed for internal mounting and comes with an included rough-in kit that has a width of 3.25"x10" damper/adapter. The Wolf Internal Blower is easy to install with an instruction link attached, and it has a capacity of 500 CFM. This model is the Wolf 810991, and it uses a 3.25"x10" duct. With its top-of-the-line specifications, this blower is a must-have for your kitchen hood.