Fan Adapter/Duct

Adapter for 40mm to 50mm fans. The OpenScad file (included) allows you to alter the size by editing parameters in the front of the code. It's set up to use M3x3mm brass threaded inserts. (https://www.amazon.com/gp/product/B01IYWTCWW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1)