Builders Best A100 Semi-Rigid Uninsulated Compressed Aluminum Air Duct, 4 inch x 8 ft

Description

Air Duct, Semi Rigid Uninsulated Type, Aluminum Alloy, 8 ft. Overall Length, 4 inch Width, UL 181 Label

Features

• Uninsulated
• Crimped end slides easily into plain end, ensuring smooth connections
• Semi-rigid corrugated easily bent metal duct that can be formed by hand into curves and small radius elbows
• Spiral formed out of aluminum alloy with 30 Deg. strength angles between ribs, mechanically locked together with continuous knurled leak-proof "Acme" lock
• Allows for better stretching and bending characteristics
• Helps eliminate flattening on the outside radius of a bend thus preventing restricted airflow

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