Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:1573014.

This is a case for the Apple Pencil accessories. It can store the Lightning adaptor, the cap of the Pencil and up to four tips. The two parts hold together with four 5 x 5 mm cylindrical magnets, mine are actually just 4.95 x 4.75 mm, so the holes for them are only 4.9mm deep.

I added a version for the second generation of the pencil for which you don't have to store a cap and lightning adaptor so just for some addtional tips. Didn't print this as I don't own a new iPad with a new pencil (yet) but it is just the orignial first generation model shrunk so it should just print as fine as the other one.