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Tree sprue base features a large center for button spruing. Fill the center with wax to directly sprue one wax grouping of waxes. Button sprue bases 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. Sizes available 2" diameter 2-1/2" diameter 3" diameter 3-1/2" diameter 4" diameter
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🇺🇸 Ship from USA · On Agora since 2026
$3.65