3" up to 6" Inch Duct Inline Reducer-Increaser - Plastic Universal Connector - Vent Pipe Size Adapter - Air Conditioning, Heating, Cooling - 3 4 5 6 In Ventilation Duct Converter (80-150mm)

Additional Details from the Manufacturer

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More features

• Universal Compatibility: Fits Ø3", Ø4", Ø5", Ø6" Inch ventilation ducts for seamless integration with HVAC systems. (can be used both as a reducer and as an increaser). Each step size: Ø79, Ø99, Ø119, Ø124, Ø149 mm
• Precise Airflow Control: Adjust airflow rates effortlessly for optimal heating, cooling, or air circulation.
• Durable Build: Made of quality plastic to withstand temperature variations and resist corrosion. Temperature range (°C): 0 ... +90
• Easy Installation: Installation in any position - Simple setup requires no specialized tools or expertise and without glue or with special fasteners.
• Versatile Application: Ideal for both residential and commercial with all types of air ducts and HVAC systems.