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Rubber Sprue base for use in lost wax casting process, bases can be used with solid flask as well as perforated flasks. These rubber sprue bases are the Tapered Cone center designed for tree spruing. The tapered cone center of the base creates a smooth and direct spout in the investment for metal.
The center hole of the tapered button holds a 5/16", 8mm sprue wax. The sprue base is made of natural rubber side walls are flexible for easy fit to the flask and assure a leak proof seal when investing for casting process.
SPECIFICATIONS: Jets Product # 0307-130
- Material: Natural Rubber
- Flask Diameter: 3" - 76mm
- Center Hole Diameter: 5/16" - 8mm
- Center Tapered Cone Diameter: 1-7/8" - 47mm
- Weight of Sprue Base: 4oz - 113gr