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M&M Manufacturing's 503ATH 20 inch Stick-On Start Collar is designed for easy and efficient installation in HVAC duct systems. This duct work accessory adheres securely to create seamless connections.
The 503ATH Start Collar by M&M Manufacturing is a reliable solution for HVAC professionals looking to optimize duct work. Its adhesive backing ensures a firm fit without the need for additional fasteners.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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