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