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The Gray Metal 4-181 is a take-off fitting designed for HVAC applications. This fitting transitions a four-inch round duct to a square duct. It is suitable for residential and commercial installations, providing a reliable connection.
This take-off fitting simplifies duct transitions in HVAC 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.
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