Perfect mold for sand casting rings. 
Sold as a set, 5 Rings XL Sizes 12-16
Rings are 3mm thick. 
Available in 4 Widths 3.5mm, 5mm, 6.7mm, 8mm
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
 
**Available With or Without Sprue