Black Rubber Sprue Bases

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