Comparison : Item # QSI-15-1, QSI-15 Shaft, Stirring, Borosilicate, Polished, 10 mm
Item # QSI-15-2, QSI-15 Shaft, Stirring, Borosilicate, Polished, 10 mm
Item # QSI-15-3, QSI-15 Shaft, Stirring, Borosilicate, Polished, 10 mm
Item # QSI-15-4, QSI-15 Shaft, Stirring, Borosilicate, Polished, 10 mm