11
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Fill very #6 with 3 M4 nuts, and lock them with #3. (4x #6, 8x #3, 12x nut M4)
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Insert 4 nuts in the fan outlet, and lock them with #3. (1x fan outlet, 4x #3, 4x nut M4)
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Only if you have the filter version: Attach the filter clip to the filter housing, with 2x M4x10 inbus
screws and 2x M4 nuts.