TechSupreme PACK OF 4 DC 12V Cooling Fan for PC Case 80X80X25MM Cabinet Fan 3.5-Inch Square Cooler (Black)

This is easily my worst purchase ever. As soon as I unpacked the delivery I knew something was amiss - the fans were all made from different manufacturers, one was visibly used and scratched, and some looked like factory reject one-offs. I had already requested for a full replacement within five minutes of delivery.I did the technical tests out of sheer curiosity, and I wish I could say I was surprised by the results. Every last fan delivered widely varying readings, uneven RPMs, and emitted disgusting loud and variable sounds - clearly caused by either used-up bearings or poorly working bearings. These fans can't even reliably meet the most basic parameters for DIY electronics, let alone any reliable cooling.If you are considering making a purchase for any reason, please don't. The airflow is almost none, the cooling is a joke, and this is a clear case of scrap electronics being dumped on innocent bystanders. It isn't just bad - it's **insultingly bad**.

Me give order for 3.5inch colling fan.but got 3inch colling fan.it not good.

Quality not good.

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