The Master Flow 4 in. x 5 ft. Beaded Metal Duct Pipe is a high-strength HVAC component designed for main trunk lines, branch lines, and return air applications. Made from durable galvanized steel, its beaded construction enhances strength and rigidity, ensuring efficient airflow and long-lasting performance. The snap lock design allows for quick and secure installation, while the crimped end ensures a tight, leak-resistant interlocking fit. This duct pipe can be cut to the required length using tin snips for custom installations. To maximize efficiency, always seal seams with building code-approved sealant or duct tape and insulate ductwork for better system performance and energy savings