The Master Flow R6X4 is a 30-gauge galvanized steel round reducer designed to transition from a 6-inch pipe to a 4-inch pipe within an HVAC system. It features hemmed collar edges for enhanced structural strength and a secure, snug fit to optimize airflow efficiency. This rust-resistant fitting is suitable for residential and commercial heating, cooling, and ventilation applications and is designed for easy installation in new or existing duct runs

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