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The Flat Plate can be trimmed down with a good pair of tin snips. Top plate measures 18" x 18". See our Top Plate & Chimney Cap Options Product Overview for a detailed explanation of each option. Please select the square collar size in the drop-down window. Note: Square chimney liner components are custom made to your specifications and are not refundable. Please contact us if you have any questions.
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We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2025
$117.99