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  • Master Flow 4 in. Round Duct Cap
  • Master Flow 4 in. Round Duct Cap
  • Master Flow 4 in. Round Duct Cap

Master Flow 4 in. Round Duct Cap

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The Master Flow 4 in. Round Duct Cap, also called a tee-cap or clean-out plug, is constructed of galvanized steel for durability. The duct cap is used to terminate or block off a rectangular duct run in HVAC systems. It can be installed with sheet metal screws (sold separately) and is suitable for most HVAC applications.