Features: High performances exhaust fan kit with double ball bearing, adjustable speed control, and efficient ventilation for optimal airflows in demanding environments. Equipped with a DC12V motor, square to round flange adapter, and sturdy iron mesh for multifunctional installation and precise airflows management. Ideal for DIY enthusiasts, 3D printing professional, cutting workshops, and sprayer painting booths requiring reliable air extraction solution. Perfect for cooling 3D printer enclosures, exhausting fumes from cutters, or improving ventilation in sprayer paint stations and small workshops. Features governor (European standard), double duct ports and 8 screws for seamless integration into existing ventilation systems, ensuring effective heat dissipation and air quality control. Specifications: Material: Plastic Size: 175x118mm/6.89x4.64inches Package Includes: 1Set 12038 Boosters Duct Fan+Speed Regulator (European Standard)+2pcs Air Duct+8pcs Screws note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item. Thanks for your understandings.