【3300Rpm AC MOTOR】- Motor Speed: 3300r/min. Impedance protected motors contain windings that have a higher resistance to heat during a rotor lock. Pure copper motor stands high temperature, saving energy and running stable. Power: 520W, Pressure: 385Pa. 【3900 m³/h LARGE FLOW】- This industrial fan is designed to maximize Air Flow: 3900 m³/h with low noise. 7 metal blades to be anti-rust of stable performance. Its impeller and blades are of a high resistance to flammability. Fan Diameter: 12inch/300 mm. The new 12-inch 5-meter fan has more substantial wind power than the original one. 【PROTECTIVE FAN GUARD】- Two high-density covers to ensure industrial mobile fan working continuously. Long-lasting and sturdy metal frame for stable efficiency, low noise, less vibration. Superior capacitor, soft start. One stainless steel piece for well operation. Easy to use and maintain. 【HUMANIZED DESIGN】- The 12" extractor fan is designed with high quality metal, compact structure and beautiful appearance of surface paint treatment. Portable and practical with a handle. 4 rubber feet to fix it. The lightweight for a fast and easy installation. 【16FT PVC DUCTING】- Applied hard-wearing, flexible vinyl woven polyester with carbon wire spring and adhesive tape, smooth inside wall to be water-proof. Designed to be super flexible and flame-retardant. Length: 16ft/5 m. Ropes adjustable. D-shaped rings are set for hanging the PVC flexible duct freely. Ideal for hotels, hotel kitchen, playground, shopping malls, bars, etc.