This is a snap fit case for NGM Dynamic Racing 3. there are also 123d design files for editing. It is divided into two for the printers as small as the Micro3D :-) I added the version made from a single piece.I used a little glue to attach the 2 parts. It is printed in high quality. The bottom was printed lengthwise to avoid a large support to detach and it has some rough edges, but if printed properly should be better!