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Galaxy Rainbow Vac Stack tubing is hand-made borosilicate glass tube with a colored inner layer, built by the vacuum-stack method from American color and German clear glass. It is sold by weight as individual pieces, so heavier pieces are also larger in diameter, roughly 15–40 mm outside diameter and 10–12 inches long. It is a material for lampworkers and glassblowers who sleeve, coil or blow their own pieces rather than a finished product. Against plain clear COE 33 tubing it offers ready-made color lining and consistent German clear, but it costs more per weight and demands care when cutting.
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This is hand-made borosilicate glass tubing, COE 33, with a lined color pattern. It is made with the vac-stack method from American-made borosilicate color and high-quality German clear glass.
Most pieces range from 15mm to 40mm in outside diameter and from 10 to 12 inches in length. The tubing is sold by weight, so heavier pieces are the larger-diameter ones. Each piece is listed individually, except the 16oz (1lb) option, which contains 2 pieces.
Options from 4oz to 10oz are single pieces. A 4oz piece has an outside diameter of about 18mm, and a 10oz piece is around 26mm. Cutting tubing that contains color rod on a wet saw voids the warranty, because slag and moisture from the saw can cause bubbling.
