

The Flexible Aluminum Foil Ducting (Part Number: AF425UL) is a high-quality air duct designed for heating, air conditioning, and exhausting applications. This UL 181 Class 1 air connector has a diameter of 4" and a length of 25', ensuring optimal airflow efficiency. Constructed with a heavy-duty, aluminum foil laminate and corrosion-resistant wire helix, this ducting is airtight and easy to use. Compatible with R94-503, it offers a reliable solution for various models.