About this 3D model

This fan fits the Noctua A12x25 metal hub. The Redux has an updated hub and wingtip, but retains the original blade profile. This fan, https://www.printables.com/model/299994-xj99c-noctua-nf-a12x25-mod is probably a better design, building off the things I have learned alon the way. Print 0.1-0.2mm, use support, do some sanding, if you like. Step file included so you can fit it to whatever hub you want. Quick testing showed 1-2% improved flow from hub & tip optimization.