World's lightest 40mm fan guard

http://bunkai.sakura.ne.jp/bunkai-wp/3d_printer/575/

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??1mm/?1.2mm??????1????????
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I made ??the fan guard with the aim of the world's lightest.
Weight is 1 gram or less below 1.2mm width 1mm / thickness.
It looks poor, serve well as a fan guard there is strength.
Further, in order to avoid contact with the fan blades, bolt hole portion is based