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If the E3D version you use includes the four fan screws that will work.
On the picture is shown two M3x8 screws to make it easier to install the fan mount - As I remember it, they are not part of the K8200 kit or E3D, but any similar M3 screw will do.
If you are concerned about fan noise I will recommend the 40mm fan version (use it myself) as you can get a very quit printer.