3 up to 6 Inch Pack of 2 Duct Inline ReducerIncreaser Plastic Universal Connector Vent Pipe Size Adapter Air Conditioning Heating Cooling 3 4 5 6 In Ventilation Duct Converter 80150mm

Universal Compatibility Fits 3 4 5 6 Inch ventilation ducts for seamless integration with HVAC systems can be used both as a reducer and as an increaser Each step size 79 99 119 124 149 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