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Insulated chimney flue extender #2100.
• Stainless steel chimney length tested to withstand temperatures up to 2,100° F (1,150° C)
• Complies with ULC thermal resistance S629 standard
• 1-1/8 in overlap between sections
• Available with a 6 and 7 in interior diameter
• A 2 in clearance is required from any combustible product
• The 2,100° F chimney has a 2 in thick wall combustible product.