The motor is attached to the body of the fan by two quick clips which enables the motor to rotate to provide connection for confined spaces and removal for maintenance without removing the whole fan or duct.  Specifications:Model:HF-1500Material:ABSColor: WhiteVoltage:220V, 50HzPower:75WAir Volume:540m3/hSpeed:2600r/mimNoise:48dBStatic pressure:300PaCaliber:144mmTemperature range:-20°C~65°CSize:320mmx210mmx220mm Features:- The shell is made of polypropylene plastic, one-time disposable molded, with high anti-acid function.- Using ABS blades, design by hydromechanics to reach the optimal air and pressure.- High-quality imported ball bearings, motor with overload protector, more flexible use, longer life.- High performance, low energy consumption and low noise.- The thickened mounting bracket is more sturdy and practical, and the screws are fixed, which is quick and convenient to install. How to Mounting:The fan can be mounted in line or at either and of the duct run and at any angle. Horizontally or vertically.All fans can be mounted in parallel to increase the volume of air or in series to increase the pressure. The casing is fitted with a mounting plate.The mounting box can be rotated to be installed in any positon for easy installation and connection. Package Included:1 x 6 inch Exhaust Fan Notice:1.Please allow 1-5mm error due to manual measurement.please make sure you do not mind before you bid.2.The colors may have different as the difference display,please understand.