Use this Stainless Steel piece to cover your ducting work over your ZTH series hood. The duct covers can be used for 7 ft., 8 ft. or 9 ft. ceiling heights.Note that the Duct Cover is not a hood, but an extension which runs from your hood to your ceiling, creating a streamlined look which conceals the hood's ventilation ducts.MFG SKU WZDC-12/9SS