Greenheck - How To Change Fan Blade Pitch - YouTube
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45MM Diameter VGA Fan 25mm/26mm/27mm Hole Pitch Quiet 5010 Graphics Card Fan Blade High Quality 12V 0.1A Fan Blade 2pin - AliExpress
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6-4343 Revcor 4 wing Free Air Fan blade 16" Dia. 23 degree pitch, CCW, requires interchangeable hub
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Fan Blade Pitch Gauge: Amazon.com: Industrial & Scientific
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