Universal reducer for ventilation systems, diameter 80 - 200 mm. Reducer connector reduction pipe diameter 80/90/100/110/120/130/140/150/160/170/180/190/200mm，decrease or increase gradually. Transitional Ventilation Round Pipe Vent Duct It can be used with HVAC system: bathroom exhaust fan, built-in fan, kitchen hood, dryer, hydroponic system, kitchen or any other place in the room. apartment, home or office. The conduit pipe has multiple diameters，Reducer connector reducing pipe diameter . The plastic is very soft but strong, so you can easily use the knife several times on the edge of the required diameter without jamming or breaking the device in the wrong position . Easy installation, using duct tape or duct clamps to connect air duct adapter. Duct vent y connector is suitable in home, offices, kitchen, factory, or apartment. Through this duct connector, the pipes of different sizes are connected together to realize the flow of air between. Duct Inline reducer used to connect pipes of different sizes, mainly used in kitchen range hoods, air conditioners, dryers, basement parking lot vents, etc. Dryer vent elbow is make of durable material, lightweight, waterproof, moisture resistant, wear resistant and pressure resistance, not easy to deform, and can be used for a long time.