4" to 3" Duct Reducer, 3 Pack ABS Ducting Airflow Tube Increaser Adapter Pipe Fitting for HVAC Heating Cooling Air Ventilation Systems 13mm X 0.5mm X 250mm The products are widely used

The products are widely used in car maintenance

If there is a gasket in the bottle cap

- Long Service Life

strictly according to the wiring diagram

* Output voltage: DC48V 10A

4" to 3" Duct Reducer, 3 Pack ABS Ducting Airflow Tube Increaser Adapter Pipe Fitting for HVAC Heating Cooling Air Ventilation Systems 13mm X 0.5mm X 250mm The products are widely usedThis duct pipe reducer connector is used to connect the pipes of equipment such as bathroom fans, range hoods and dust collectors to the ventilation duct system, you can connect two air ducts of different diameters to create a seamless ventilation system duct. Suitable in home, offices, kitchen, factory or apartments. Specification Color: White Material: ABS Height: 80 mm 3. 15 inch Inner Diameter: 100 x 75 mm 3. 94 x 2. 95 inch (Big*Small) Outer