The ADDA AD0405HB-G73 DC5V 0.25A 4CM 40*40*10MM 40mm Cooling Fan is a high-quality case fan designed for cooling computer systems. With a fan diameter of 40mm and a voltage of 5V, this 3-pin fan from ADDA is efficient in dissipating heat and maintaining optimal temperatures for your computer components. Its compact size of 40*40*10mm makes it suitable for various computer setups, providing reliable cooling performance for a smooth and efficient computing experience. postage is 2 to 4 days