3″ to 4″ duct expander

SKU: BRN:463B

This duct increaser is designed to fit with our economy fan duct connector assemblies. It will work with 4″ round duct systems, is UL 94 compliant for flammability, and made in the USA.

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SKU: BRN:463B Categories: ,

Description

This duct increaser is designed to fit with our economy fan duct connector assemblies. It will work with 4″ round duct systems, is UL 94 compliant for flammability, and made in the USA.

Additional information

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