Khay Đựng Gạch Rummikub 4 Hàng

The tiles fit a little to loose for my liking, so I added a lower lip to hold the bottom of the tiles more snug.

I also shaved some off the top to make it level across the entire surface for better printing.

This STL should be now laying flat. I used .25 setting on my MK4S. 

Slice it top down, (it should be ready to slice, at least if you use Prusa slicer). No supports needed.