To select the right fan for "220V Cooling Fan" radiator, first noticed, is also necessary to note, fan of sizes. The size of the fan set uniform standards, in accordance with the normal installation as long as this set of criteria can guarantee with fins or other interface between the bracket. Dimensions typically used to describe a four yuan numbers, for example: 2510,4028,6015,8025,1238 like. 4 yuan element 25, 40, etc. The first two digits representative "220V Cooling Fan" square side length of the bottom surface, in mm; after two 10,28,30, etc. are representative of the height of the cylinder, i.e., the thickness of the fan, units with millimeters. Special Pan Description: 92XX series of fan side length of 92mm, but often referred to 9cm; 12XX or 17XX series of 12mm or 17mm side fan is not long, but 12cm or 17cm; common DC brush less "220V Cooling Fan" side length a minimum of 25mm, 99mm and greater than the fan to the lowest bit rounding, value in cm. Below is a 6015 fan Specifications: