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Upgraded 4 Pcs 4Inch Scientific Glass Tube Clear Test Tube Down Stem for Science and Lab Experiments with 2 Cleanning Brushes (10cm) from $13.99	JSpunk 4 Pcs 5-Inch Scientific Glass Tube Clear Test Tube Down Stem for Science and Lab Experiments with 2 Cleaning Brushes, Upgraded Set (12cm/5in) from $16.55
Generic Glass Tube Clear Test Tube Down Stem for Science and Lab Experiments with 1 Cleanning Brushes （2pcs） from $10.98	6 Pcs 5.5Inch Scientific Glass Tube Clear Test Tube Down Stem for Science and Lab Experiments with 2 Cleanning Brushes (14cm/5.5in) from $22.98
4 Pcs 4Inch Scientific Glass Tube Clear Test Tube Down Stem for Scientific Experiments,Glass Test Tubes with 2 Brush from $13.99	Hinkley 4312CMStem from Stem collection from $24.00
Hinkley 4312PZStem from Stem Collection from $24.00	Hinkley 4312OZStem from Stem Collection from $24.00
Hinkley 6068OZStem from Stem Collection from $24.00	Hinkley 4312PLStem from Stem Collection from $24.00