

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The M&M Manufacturing 503ATH6 is a six-inch air tite start collar designed for HVAC applications. This collar connects ductwork to provide efficient airflow. It is suitable for various installations and enables a secure fit for duct systems.
The start collar is essential for duct connections in air distribution systems.
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.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!