A:Answer Hey there, and thank you for reaching out to us about this ceiling duct cover kit. We appreciate your interest and can advise the dimensions of the unit are 19-11/16" H x 8-1/4" W x 7-1/16" D. We would recommend reviewing the installation instructions of the hood these pieces will be used for to determine the heights. Those instructions will have a chart that indicates where each extension should be used and how high it will reach. We hope this information helps, and you are welcome to reach out to us with the model number of the hood if needed; we'd be happy to review this further. We're also happy to help with any other concerns or inquiries. Wishing you all the best! -Sarah@GEA
