2Pcs 4" to 3" Duct Reducer Ducting Airflow Tube Increaser Adapter Pipe Fitting 9mmx15mm 1x Flexible Shaft Coupler

1x Flexible Shaft Coupler

Material: Nylon 66

good insulation aging

Diameter: 120x14mm/4

Fit for all kinds of art and leather crafts and DIY clothing production

2Pcs 4" to 3" Duct Reducer Ducting Airflow Tube Increaser Adapter Pipe Fitting 9mmx15mm 1x Flexible Shaft CouplerThis 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