Made of thick & durable galvanized sheet metal - used for HVAC system duct work in any building or home.. Durable galvanized sheet metal with crimped ends (Snap-Lock Design) for easy fitting and secure connection to consecutive Duct joints. Made of galvanized metal to prevent corrosion and oxidation & rust from water & moisture that lasts longer requiring less maintenance save money with this energy-efficient material maximizes airflow and reduces fire hazards.. Quality packaging - carefully packaged in a corrugated box to prevent damage in shipment - hand inspected for quality..
