This 30mmx30mmx10mm 5v Brushless DC Cooling Fan from Gdstime is a reliable and efficient unit that is perfect for your computer cooling needs. The fan is made of high-quality plastic material and has a sleeve bearing type for added durability. It has a fan diameter of 30mm and a voltage of 5V, making it a powerful and versatile unit. It has a length of 30mm, a width of 30mm, and a height of 10mm. Each fan is individually packaged with 4 nuts and bolts. The fan is designed for use in computers and other electronic devices that require cooling. It has a 2-pin power connection. It is ideal for use in computer components and parts.