The Flat Plate is 18" x 18" and can be trimmed down with a good pair of tin snips if you need it to be a smaller size.

See our Top Plate & Chimney Cap Options Product Overview for a detailed explanation of each option.

Please select the oval collar size in the drop-down window to complete your top plate selection.

Note: Oval chimney liner components are custom made to your specifications and are not refundable. Please contact us if you have any questions.