fan adaptor for 40mm to fan duct
thingiverse
A creator of DIY projects shares a useful modification for the Geeetech Prusa I3 Pro B, namely an adapter that converts a 40mm fan into a blower. This adaptation can be found on Thingiverse at http://www.thingiverse.com/thing:1232212. Additionally, another user has designed a circular fan duct specifically for the Geeetech MK8 BlTouch, which is available on Thingiverse at http://www.thingiverse.com/thing:2039119
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