xinyujie 8015 cooling fan MOQ:200pcs Payment:T/T,L/C, ... light vibration,strong cooling, muti-role, long life and environmental protection. 2.Application :Widely used in computer communication products, optoelectronic ... equipment and other machines.3.How to know the cooling fans grade?1.When we choose the fans , ... pressure. 2.when the air flow reach the cooling demand,we choose the fans with lower speed, ...