This ring is perfectly for 3D printing.
Sizes are:
inner-diameter 13mm, outer-diameter 16mm, height 6mminner-diameter 14.2mm, outer-diameter 1.72mm, height 6mminner-diameter 15.5mm, outer-diameter 18.5mm, height 6mminner-diameter 16.7mm, outer-diameter 19.7mm, height 6mminner-diameter 18mm, outer-diameter 21mm, height 6mminner-diameter 19mm, outer-diameter 22mm, height 6mm<
If you want custom sizes please contact me via the contact Designer button on the right.