These are Replacement feet for the Unibody Macbook Pro from Late 2011. For the different corners you need to cut a little bit off the model in the slicer. When looking from the bottom, the top right needs the shortest stump, the bottom left is dependend on what kind of hard drive you have and the other two need to be shortened by about 1mm off the top. I haven't tried yet, but flexible filament would probably work nicely.
The author hasn't provided the model origin yet.