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Today's Hours 8am - 11pm estThe premium exterior piece for your two-part assembly! Designed to clamp a 1" duct board through a 3.5" hole, our product forms a tight and secure seal that ensures optimal performance and efficiency for your air duct system. Our outside take-off is specially designed to connect to a Ferrule or Elbow Extension, providing a reliable and high-performing connection between your ducts. Invest in our exterior piece today and enjoy a duct system that is built to last, with airtight seals and optimal airflow!