Sprue Base For Jewelry Casting and Investment Each

A must have for casting gold, silver and precious metal jewelry. Attaches to a solid or perforated flask. Rubber sprue base is made to last for years. Melt wax into the center hole and then either add a sprue or attach wax models right to the dome base. Tree sprue base are perfect for high production jewelry making studios. Sprue base assures a leak proof seal when casting.

• Height 1" inch (26mm)
• Heavy rubber construction
• Choose from 2", 2.5", 3", 3.5", 4" and 5" base