NEMA 17 fan holder
thingiverse
Fan bracket for NEMA 17 stepper motor. The fan is scavenged from an old heat sink cooler. Similar to this one at link, https://www.banggood.com/2-Pins-55x10mm-12V-Heatsink-Cooler-CPU-Cooling-Fans-PC-Computer-p-920742.html?rmmds=search&cur_warehouse=CN
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