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: 30m³/h<br > 32mm air volumes: 35m³/h<br > 40mm air volumes: 45m³/h<br > 50mm air volumes: 55m³/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.