Squirrel Cage Fan: DIY for car amp cooling, custom computer builds, RV fridge coils in hot weather, 3D printer optimization, Christmas decoration replacement, caravan refrigerator improvement, 12V Cooling Fan: BBQ guru replacement, gaming console heat expulsion, and humidifier, replacing fans on 3d printer,to replace a noisy fan or for a custom mini pc project. For use in incubators. 12 Volt Cooler: Keeps car amp from overheating, ensuring optimal performance for the MTX Thunder75.4. May be underpowered in some applications due to 3 inch fan size. Dual Ball: Crafted with durable materials, our dc fan are corrosion-resistant and built to withstand wear, 50000 hours providing reliable performance for years to come. 12V Centrifugal Fan: Dimension: 75mm(L) x 75mm(W) x 30mm(H) / 2.95x2.95x1.18 in. per fan；Rated Voltage:12V 0.29A; Speed: 3500RPM; Air flow: 14CFM; Noise:39dBA；Package include: 1 Piece fan and mounting screws & nuts