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Extensions are available to increase the door length of Size C basement doors. Classic series basement door extension panels are available in 6”, 12”, 18”, 24” and 30” lengths. Two or more can be mounted back to back to increase the door length to virtually any size. Steel extension panels are supplied with a primer finish. Click Below to View: Extension Specifications
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We currently ship within the US, with more countries coming soon.
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🇺🇸 Ship from USA · On Agora since 2026
$428.00