

The Sheet Metal Long Collar w/Crimp (Part Number: 11509) is a premium transition piece used to connect flat plenums or duct runs to round pipes or flex ducts. This high-quality collar, made of 28-gauge metal, ensures a durable connection for duct sizes up to 9 inches. It boasts a unique crimp design that enhances airflow efficiency, supporting up to 500 CFM. Installable in under 10 minutes with standard tools, this part guarantees a seamless transition and optimal airflow.