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10 Pcs Borosilicate Glass Tubes 4 Inch (10 cm), Thick Glass Blowing Tubes, 2mm Wall Heat Resistant for Lab Experiments DIY Projects Industrial Use, Acid Alkali Resistant, Multicolor

8-Pack Borosilicate Glass Tubes, 4 Inch Long, 12mm OD, 2mm Thick Wall - Heavy Duty Fire-Polished Glass Blowing Tubing for Lab, DIY, Art & Industrial Use (Clear)

5 Pcs Borosilicate Glass Tube,4 Inch(10 cm) Thick Glass Blowing Tubes,2mm Wall Thickness,High Heat Resistance for Blowing,Lab,DIY,and Industrial,Acid and Alkali Resistant

Rinercber 10 Pcs Borosilicate Blowing Tubes, 3.9 Inch Length, 7mm ID, 12mm OD, 2mm Wall Thickness - High Temp Resistant for Industrial, Laboratory, and Craft Projects, With Cleaning Brush

starfa lab 5 Pcs Borosilicate Glass Tube 4 Inch Thick Glass Blowing Tubes,2mm Wall Thickness,High Heat Resistance for Blowing,Lab,DIY,and Industrial

Glass Tubes 12 Piece, Reusable Glass Straws 6 Inch Long, OD 10 mm, Thickness 1.5 mm, Clear Industrial Borosilicate Glass Tubing for Short Cup (10mm-6IN-Clear)

Worldity 20 Pcs 8 Inch Long Glass Borosilicate Blowing Tubes, Industrial Clear Glasses Tubes for Glass Blowing 12mm OD, 8mm ID, 2mm Thick Wall with 4 Cleaning Brush for Laboratory Experiment