These are just some basic riser legs to lift up a laptop that is in the corner of my office acting as a server. It doesn't get too hot so trying to keep it cool isn't really the goal here, mostly im trying to keep it off of a flat surface so that it doesn't get as hot is all. I will probably rework one of the legs to be able to put a fan in it in the future. Instructions: You will need to print 2 Lefts and 2 Rights, arrange them to the corners of the underside of the laptop and you should be set. Currently I have done mine on Medium quality with about 8% infill is more than sufficient for my needs. This is a work in process, with my printer I have not been able to bridge correctly to produce this part flawlessly regardless what direction its standing on the build table.. I have found laying on its side produced the most reasonable results for my taste. *Printing with a Wanhao Duplicator 4