Features: Experience the power of efficient air circulation with the inline duct fan, featuring a high speed variable frequency motor and impressive airflows for optimally ventilation.<br> Designed with durability in mind, this inline fan boasts a robusts case and a pure copper outer rotor brushlessness motor that ensures continuous operation without overheating or deformation.<br> For hydroponic enthusiasts, indoor gardeners, and homeowners seeking to enhances their living space's air quality, this duct fan caters to those who prioritize a healthy and comfortable environment.<br> This inline duct fan is a customizable solution for maintaining temperature and humidity levels in your targeted spaces.<br> Can be used with various 12V power adapter, battery power supply, exhaust fans, and can also be used for fire combustion.<br> Specifications: Component:PVC<br> Size:Approx.14cm/5.51inch<br> Inner diameter of circular tube: 5cm/4cm/3.2cm/2.5cm<br> Rotating speed:24300r/minutes<br> Noise:53db<br> The wind pressure: 450pa<br> 25mm air volumes: 30m/h<br> 32mm air volumes: 35m/h<br> 40mm air volumes: 45m/h<br> 50mm air volumes: 55m/h<br> Input interface: 5.5x2.1mm<br> Package Includes: 1pcs Ventilation Exhaust Fan<br> note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order.<br> 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item.<br> Thanks for your understandings.