The motor is connected to the body of the fan by way of two brief launch clips which allows the motor to rotate to produce connection for confined places and cutting off for upkeep without removing the whole fan or duct. Name: 4 Inch Inline Duct Hydroponic Air Blower Fan Ventilation System Low Noise Fan Specifications: Model: HF-100 Material: ABS Color: White Voltage: 220V, 50Hz Power: 35W Air Volume: 220m3/h Speed: 2600r/mim Noise: 28-30dB Static Pressure: 150Pa Caliber: 92mm Temperature Range:-20°C~65°C Size: 230mmx175mmx148mm Features: - The shell is made of polypropylene plastic, one-time disposable molded, with excessive anti-acid function. - Using ABS blades, design by way of hydromechanics to reach the optimum air and pressure. - High-quality imported ball bearings, motor with overload protector, more flexible use, longer life. - High performance, low energy intake and low noise. - The thickened mounting bracket is more durable and practical, and the screws are fixed, which is short and useful to install. How to Mount: The fan would be fastened in line or at both and of the duct run and at any angle. Horizontally or vertically. All followers can be mounted in parallel to increase the quantity of air or in sequence to increase the pressure. The casing is fitted with a mounting plate. The mounting box could be turned around to be put in in any positon for simple set up and connection. Package Included: 1 x Exhaust Fan Notice: 1 allow 1-5mm error because of instruction manual measurement. Please ensure you don't mind earlier than you bid. 2 colors may have assorted because the difference display. Please understand.