This provides a front blower fan mount and fan duct for the wanhao i3, while leaving the nozzle unobstructed. Support material can be used, but not internally. I haven't tested PLA, but I doubt it would work without the part warping or drooping during use. Print with PET, ABS or any other filament that can withstand the heat from the hotend. The 2 M3 Screws that mounted the stock fan work fine for mounting it, you will also need 2 M3 nuts, an M4x20mm screw, and an M4 Nut. The 2 fins that help to hold in the blower fan are quite fragile, be careful with them. I've tested this on my wanhao di3 v2, but it should work on all versions of the wanhao i3 and its rebrands. send any feedback to reddit.com/u/linkfan88