CPU Cooling Fan Compatible for Lenovo E40-30 E40-45 E40-70 E40-80 E41-70 E41-80 B40 B40-30 B40-45 B40-70 B40-80 N40-45 N40-70 N40-80 B50-45 B50-70 B50-80 N50-30 N50-45 N50-70 N50-80 Series Laptop