The fan is ok, but I expected to see in the package a fan duct , the one that come with the printer.
3010 Cooling Fan aims to cool down the heatsink during print, it can prevent your filament is overheat and clog inside. The fan speed is up to 8500r/min.
4010 Blower Fan plays an important role in cooling down the nozzle part when filament comes out and use to cool the model in a timely, The fan speed is 6800r/min, you can manage your cable neatly in an easy method and get ready to start printing.
Package Included： 4010 Blower fan*1+3010 Cooling fan*1
Product Size: Blower fan: 40*10mm ; Cooling fan: 30*10mm
Net weight: 30g