Features: Enhances your ventilation system's efficiency with Duct Fan Reducers Nozzle, accessory for airflow management. from PVC, this Reducers nozzle to 50mm duct fan and comes in various inner diameters 20mm, 25mm, 32mm, and 40mm, ensuring for smaller ducts. for DIY and professional, this product simplifies process of connecting exhaust fan to narrower ductwork without compromising performances. Transform any kitchen or bathroom ventilation with ease, thanks to this universal duct fan Reducers that ensures air circulation in confined space. Experience installation and maintain a streamlined aesthetic in space with duct fan accessory, elevating your cooling systems functionality. Specifications: Materials: PVC Inner diameter: 20mm, 25mm, 32mm, 40mm(optional) Package Includes: 2Pcs Dryer Vent Hose Nozzle note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.