Found 2 3D-models for “improved flow” across many websites

#printrbot#fan shroud#fan#improved#E3D Hotend#improved pressure#printrbot fan shroud#High Air Flow#E3D#genuine e3d
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Printrbot Simple Metal Improved High Flow Fan Blower Upgrade

Printrbot Simple Metal Improved High Flow Fan Blower Upgrade

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E3D Fan Duct Improved Flow

E3D Fan Duct Improved Flow

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