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

#fan shroud#e3dv6#MPSM#30mm fan duct#noctua#shroud#MPSM V2#E3D Hotend#MPSM V2 Improved#fan
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E3D Fan Duct Improved Flow

E3D Fan Duct Improved Flow

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Monoprice MP Select Mini V2 40mm Fan Shroud with Fan Booster

Monoprice MP Select Mini V2 40mm Fan Shroud with Fan Booster

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