120mm Fan to Duct adapter

thingiverse

I mocked up this adapter when the heat from my Antminers became unbearable in my basement. They easily connect into standard 120mm fans, making them an ideal size for 4-inch flexible ducts commonly used with household dryers. I designed the adapter using Imperial measurements, so be sure to double-check your settings before printing a small adapter that could be off by a critical dimension. EDIT: I've since redesigned it to fit metric units perfectly. It should now fit seamlessly into traditional 120mm fans and 4-inch ducts.