Features BETTER DESIGN The fan comes with a 2 pin connector, the fan allows for a tight connection that is unlikely to loosen or fall off. Fast Cooling The brushless DC fan with base bearing ensures fast heat dissipation for stable working. Wide Range of Applications Our motor fan can be used for 3D printers, computer cases, humidifiers, small household appliances, control devices, etc. Easy to Install This fan is designed to be light weight and compact size, convenient installation can be completed quickly. Total 4 pieces: the set includes 4 DC fans, and the large quantity will surely meet your replacement needs. Specification: Item Type:Brushless Fan Product Model: 4010 Product size: approx. 40 x 40 x 10 mm / 1.57 x 1.57 x 0.39 inches. Application: fan for 3D printer hot end, extruder, motherboard, power supply, etc. Package list: 4 x brushless fans. Package List 4 x Brushless Cooling Fan