China Leverancier 40*40*7mm 40mm 4007 DC 5 Voltage Axiale Cooling Ventilator Fan - China Electric Fan, Radiator Fan | Made-in-China.com
Amazon.com: ELUTENG 40mm USB Fan with 3 Speed Control USB Ventilator 5V Max 5300RPM High Flow Equiped with 40mm Fan Filter 2 Pack Dustproof Cover USB Cooling Ventilator Plastic Grill : Electronics