Perfect mold for sand casting rings. 
Sold as a set, 8 Rings Sizes 5-12.
Available in 3 Widths. Round Top Measures: 20mm, 15mm, 10mm
3D printed in our store with a sprue for casting.
Reusable with Sand Casting
Carvable (solid resin), can be burned out in a kiln for Lost Wax Casting