"24V DC Cooling Fan" nets due to the cooling fan sizes, so be divided according to product type, then there is 4cm-25cm twenty species. If you follow the color of points, then it can be divided into gold, silver, black, stainless steel and other qualities. Due to customer demand, the company also produced specifically for customers with metal mesh. So "24V DC Cooling Fan" has three kinds of nets into four categories. The most common size is generally in accordance with the specifications as well as the grille color classification.