Otoolling 7 Inch to 4 Inch Duct Reducer Increaser Galvanized Steel Air Duct Adapter Round Crimped Pipe Connector Fitting Coupling for HVAC Ventilation Systems Caliper Kits & Sets The ergonomic design allows precise

The ergonomic design allows precise handling and improved balance

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Otoolling 7 Inch to 4 Inch Duct Reducer Increaser Galvanized Steel Air Duct Adapter Round Crimped Pipe Connector Fitting Coupling for HVAC Ventilation Systems Caliper Kits & Sets The ergonomic design allows preciseBrand: Otoolling Color: Silver Features: Size Details: the 7 inch to 4 inch duct reducer measures about 5. 9 inches 150 mm in length, 0. 02 inch 0. 6 mm in thickness, ideal for connecting 7 inches and 4 inches duct systems to get a smooth transition; Please check the specification and size of the product before purchase Tapered Design: the 7 inch to 4 inch pipe reducer increaser features a precision tapered design, to reduce air flow turbulence and