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The fan itself and the motor are ok but the vertical stand has serious design and QC flaws. I bought two of these and had to return one. For the faulty one, the nut/screw/bolt that secures the height of the fan does not securely fasten it, thus it's impossible to hold the fan at an extended height. The guy collecting it said there was another customer who returned on the same day as me. Bad OEM product but at a cheap price, it's quite a gamble.