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DC 12V 2Pin Mini Cooling Fan 40MM 40x40x10mm Small Exhaust Fan for 3D Printer: Amazon.com: Industrial & Scientific,

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JZK 40x40x10 mm 2pin DC 12V Mini Silent Cooling Fan with Wires, 4010 Small Quiet Cooling Fan 40mm, 4cm 12V brushless DC Fan, 3D Printer Fan with Cable ,