This is another custom-made Gravitrax Funnel designed to be printed with the smallest layer height possible on your printer. On a normal 3D printer, a layer height of 0.08mm could be sufficient but I think it's better to print it with a resin printer. If you want to print 1 funnel, you also need to print 3 of the rings.

Ring is taken from: https://www.thingiverse.com/thing:4900813

Here's the improved version of the original GraviRing remixed by me for resin printers (the same happens on a normal 3D printer depending on the layer height, 0.08mm leaves a 1 layer floating region on the teeth on the original GraviRing): https://www.thingiverse.com/thing:6835338