21.784 = Rubber Button Sprue Base  4'' 21.784 = Rubber Button Sprue Base  4'' 21.784 = Rubber Button Sprue Base  4''
21.784 = Rubber Button Sprue Base  4'' 21.784 = Rubber Button Sprue Base  4'' 21.784 = Rubber Button Sprue Base  4''

21.784 = Rubber Button Sprue Base 4''

$5.50
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Article number: 21.784
Availability: In stock

This rubber sprue base features a large center for button spruing.  Fill the center with wax to directly sprue one wax grouping of waxes.

Friction fit them onto the bottom of your steel casting flask.

Fits a 4" diameter casting flask.

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