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10pcs/lot Transparent Pyrex Glass Blowing Tubes 12mm Od 100mm Long Thick Thickness Wall Test Tube 10*100mm Wholesale Test Tube - Test Tube - AliExpress
Glass tube Pyrex 12 mm X 2 mm X 4"-6"-8" Blowing tube ID=8mm Color | eBay
12pcs 8mm OD Pyrex Glass Tubes Borosilicate Glass Blowing Tubing Clear 12 " Long | eBay
MageCrux 10Pcs 15*100 Mm Glass Blowing Tubes 4 Inch Long Thick Wall Test Tube - Walmart.com
Blow Pipe Small
Borosilicate Glass Blowing Tubing 12" 10mm OD ,inner 7 mm ,1.5mm Thick Wall | eBay