It is very suitable for sink drain, bathroom or kitchen oil extraction fan, hydroponics, direct exhaust extraction fan or cookware cover., 1., Please allow 1-5MM error due to manual measurement., 2., Due to the difference between light and screen, the color of the item may be slightly different from the picture. PATIKIL 5 Inch to 4 Inch Round Duct Reducer Increaser Connector PATIKIL 8-Inch to 4-Inch Round Duct Reducer Increaser Connector Galvanized Steel Air Duct Adapter Pipe Fitting for Bathroom Kitchen Inline Ventilation Systems Silver Tone in the Duct Transitions & Connectors department at User-friendly and simple to install. Wide application: ATOM NEXUS 8 to 6 inch duct reducer is widely used, typically for the installation of residential and commercial ventilation systems, hydroponics and HVAC ventilation systems, inline ventilators, bathroom kitchen extractor fans, and more. See more product details Report an issue with this... Plastic rigid pipe is very suitable for DIY and trade use. Frequently bought together This item: Duct Adapter, 100-120mm Duct Reducer Cone Increase for Grow Tent Bathroom Kitchen Ventilation Systems €617 Get it Kair 4 inch / 100mm PVC Flexible Hose (102mm Dia) - 3 Metre Length - Plastic Air Conditioning / Ventilation Ducting - SYS-100 - DUCP0092/102/35 by Kair €1905 Get it Total price It can be used in any apartment, home or office space such as drainage system, bathroom fan, direct exhaust ventilator, stove cover, dryer, hydroponics, kitchen, etc.