This is a fan shroud for the Simple Metal 1403 - Ubis 13HF hot end. I designed the shroud using a standard fan shroud and mesh mixing the thing, I had several versions of this that I made, before settling on this rendition. I have been using for several months, and the prints are very good. Also this shroud has thicker walls than most. All of the shrouds I downloaded from other users, seemed to have thin walls or holes within the wall structure.