It's a Euro-Chip for the shopping basket (tested in Germany) in a two-color version.
You can print it with 0.4 noozle, 0.2mm layer-height and 30% Infill (100% infill does not seem to have any advantages.). You don't need any brim and/or gluestick on a PEI-Printplate.
For the two-color version, you have to add a color-change on layer 6 (1.2mm).