642-S&P model 642 wall cap. Aluminum natural finish, built in backdraft damper. For 3″ or 4″ round duct. 4″ to 3″ transition included.
Description
S&P model 642 wall cap. Aluminum natural finish, built in backdraft damper. For 3″ or 4″ round duct. 4″ to 3″ transition included.
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