... of Blower DC Fan China OEM,Transparent color Blower Fan AC Fan,CPU coolers, DC brushless fans, CPU cooling fan equipments, computer case fans, computer ... of the blade axis.Standard DC Axial fan sizes include 20mm,30mm,40mm,50mm,60mm,70mm,80mm,92mm,120mm,150mm,200mm. 2 ... .What is a bearing? Fan bearing includes Sleeve Bearing and ...