Item Condition Used - original retail box shows some wear. Previously used, Complete parts. Not Tested Item Location Ships from our warehouse in Las Vegas, Nevada, 89102, USA Fast FREE Shipping We handle all paid orders within 1 business day. Best Offers Accepted Offers are reviewed at the close of business each night. We accept reasonable offers for - Multiple units of the same item - Errors or condition changes within our listing - Combining shipping for 2 or more separate orders Return Policy We offer a 30 day return window from when you receive the item. Items must be in the same condition and in original packaging. Seller Warranty - We Protect Against Defects Our in-house technicians evaluate and refurbish every electronic item we list. We are proud to offer our customers a 30-day warranty against defects. Contact us directly by selecting "I have a question about using my item or I want to send the seller a message." We are eager to hear from our customers. Product Description 6-inch round, universal make-up air damper kit for use with any Zephyr range hood motor operating over 300 CFM and up to 600 CFM. When range hoods exhaust air out of your home, negative air pressure is created unless the exhausted air is replaced by fresh outdoor air. Zephyr's make-up air damper is designed to balance the air pressure in your home by automatically opening to allow fresh air in while the range hood is operating. Universal Design Can Be Used with Any Zephyr Range Hood Operating Over 300 CFM 6 in. round damper size For Range Hoods up to 600 CFM Automatically opens when range hood is operating Automatically closes when range hood is off Meets international residential code M1503.4