Perfect mold for sand casting rings. 
Sold as a set, 8 Rings Sizes 5-12.
Available in 3 Widths. Oval Top Measures: 20x10mm, 20x15mm, 15x10mm
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