4 inch #404D Ductboard Tab Collar

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4-inch flanged starting collar without a damper, expertly crafted to provide a secure and reliable transition fitting for your ductwork. Constructed from high-quality galvanized st eel, this starting collar ensures exceptional durability and long-lasting performance, making it ideal for both residential and commercial applications. The absence of a damper simplifies the design, reducing potential points of failure and maintenance requirements. Ideal for HVAC professionals and experienced DIY enthusiasts, this flanged starting collar is easy to install and fits seamlessly with standard ducting components. Show more