This does nothing for the printer, and is purely cosmetic.
[!! Requires using a 12mm M3 bolt from the spares bag instead of the 10mm that's currently used]
[09 August 2018 - Updated the model to have a better fit.]
Prusa has recently released a new Nozzle Fan shroud, read for the details in this blog (see 'Better cooling and extruder upgrade'): -
and you can find the STL here(see 'MK3 & MK2.5 new extruder parts (July 17, 2018)'): -
The new design loses the original HOT!2 text, and instead there is nothing.
I made this cover to add back that text, restoring some of the original looks.
It fits on top of the new nozzle design, as a cover, and all you need is the 12mm M3 bolt from the spares bag instead of the 10mm that's in use.
I personally liked the looks of the orange nozzle fan guide but I only have black ABS. (I want it in ABS because I found my Original PETG shroud started to deform)
Because I already have Prusa orange PETG I didn't want to order some orange ABS.
You have to print this in temperature resistant filament like ABS or PETG,
PLA is a no go, it will probably fail.
It simply sits in place on top of the new nozzle design. It doesn't sit flush with the bottom to avoid any issues from potential drooping.