Wanted to get a better feeling for the materials and ordered these two test prints. Steel quality is very good, detail reproduction is beyond expectation. There is significant shrinkage on the glass sample, it also more like a very hard plastic, no real feel of glass. The glass surface is very bumpy and randomly distorted. Details not very perceivable. The digital model has a diameter of 31 mm, the numbers and letters are 0.5 mm thick, the map of Europe +-0.2 mm. The steel print matches in size, the glass is only 29 mm wide.