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Amazon.com: PQAPGT 6 Inch Long 5 Colors 10 Pieces Glass Borosilicate Blowing Tubes 12 mm OD 2mm Thick Wall Tubing for Various Applications : Everything Else
Amazon.com: Cornucopia Colored Borosilicate Glass Tubes (12-Piece Set, Assorted Colors and Sizes); Boro Tubing for Glass Making and DIY : Industrial & Scientific
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FZN Borosilicate Glass Test Tube 15 * 125 mm (pack of 50 pcs). : Amazon.in: Home & Kitchen
HUAOU 10pcs 60ml Glass Test Tubes, 25x150mm 3.3 Borosilicate Glass Test Tubes for Scientific Experiments, Party and Home Decorations, Candy Storage and Plant Propagation: Amazon.com: Industrial & Scientific