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Do you have a fan 7 feathers with 3700 spm or 4200spm?

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Q:

Do you have a fan 7 feathers with 3700 spm or 4200spm

A:

Yes, we have, but normally the avarage spm is 2700, we recommend you to use the 2700spm since the spm will impact on fan's working life if the spm is too high.

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