Art-deco style domed speaker grill. As is, it makes a grill for a 55mm speaker (to fit an MFOS Noise Toaster) but you can alter everything (diameter, ...thickness, number of bars, dome height...) to suit. Note that as you vary the print layer thickness, you will get coarser/finer stepping on the bevels and domed grill; this actually looks pretty good.
3d model print parameters
I printed the two examples shown on a K8200, using Form Futura "silver" EasyPLA and a 0.5mm nozzle, onto kapton. The coarser one is printed at 0.4mm l...ayer height and 3 perimeters, and the finer one at 0.25mm layer height and 10 perimeters. Both had temperatures of 215C nozzle, 55C bed.
Note that the "look" changes drastically as you change the layer height. Feel free to experiment, the OpenSCAD file is included.