Lambro 317 10-In. X 8-Ft. Flexible Semi-Rigid Aluminum Duct

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Airtight design ;
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Fire-resistant;
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Class 0 air duct;
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Improved airflow ;
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Highly flexible ;
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Installer friendly ;
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Patented;
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Uninsulated;
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Operating temperature range: -86deg F to 482deg F;
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Max. velocity: 5,000 FPM;