Rubber Sprue Base 4" Flask Round Cone Type C Tree Spruing Jewelry Wax Casting

Description

Rubber Sprue Base 4" TYPE C
ROUND CONE for TREE SPRUE
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LOST WAX CASTING
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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 have a round Cone center designed for tree spruing.
The center hole of the cone 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. The bottom of the base is ribbed to prevent sliding on wet surfaces.
SPECIFICATIONS:
Jets Product # 0307-040
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Material:
Natural Rubber
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Flask Diameter:
4" - 100mm
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Center Hole Diameter:
5/16" - 8mm
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Center Cone Diameter:
1-3/48" - 44.5mm
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Weight of Sprue Base:
6.6oz  - 187gr
SHIPPING: Via USPS First Class
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