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The BUILDERS BEST 110759 Metalflex V350-U is an uncompressed aluminum alloy air duct, 5 inches in diameter and 8 feet long, designed for HVAC systems. It features 30-degree strength angles between ribs and a mechanically locked, leak-proof "Acme" lock. This UL 181 certified Class 0 air duct, compliant with NFPA 90a and 90b, ensures efficient airflow by preventing flattening on bends. It operates within a temperature range of -100°F to +430°F.
UL 181 certified Class 0 uncompressed aluminum alloy air duct with factory crimped ends for smooth connections.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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