Rectangle Shank Sand Casting Ring Mold Set The perfect mold for sand casting rings, this reusable ring mold set is designed for versatility and ease of use in the studio. Available in 3 Sets    US Sizes 0-6, 6 piece    US Sizes 5-12, 8 piece    US Sizes 12-16, 5 piece Available in 4 Widths Widest section measures:     3.5mm     5mm     6.7mm     8mm 3D printed in-house using solid resin and includes an integrated sprue for casting. Features:     Reusable for sand casting     Carvable solid resin for customization     Can be burned out in a kiln for lost wax casting Ideal for jewellers looking to efficiently produce ring forms while maintaining flexibility for custom designs.