Plastic injection molding is a difficult process to get right especially when factories are running at breakneck speeds to produce more material than the machines were designed for per hour. The cooling cycle is cut short and the water jacket does not cool and harden the plastic blade enough to hold the shape once the mold opens and parts are removed and thrown into a pile while still hot and soft. Thank an accountant for garbage products we see now.
I have to of these they are good fans but they are so off-balance i have to keep it tied to a suitcase or in the window and one of them is from the trash and has a real good startup sound
