70mm Long Duct For 40mm Fan

Simple fully hollow 70mm long fan duct for 40mm fans. Ideal for low output fans, I am using the one that came with my Tevo that is used to cool the main board.

Has a 4mm wide with a 3mm hole for mounting. The duct is very light and works great

The picture of the tiny Eiffel Tower test print shows with cooling on the left and without on the right. Used the same g-code, filament and machine.