Pasteur Pipettes, made from Borosilikat glass 5.1Pasteur Pipettes, made from Borosilikat glass 5. 1, 150 mm Thanks to their material properties, Pasteur pipettes made of borosilicate glass 5. 1 are a high quality alternative to plastic pipettes and pipettes made of soda lime glass. Features and Benefits: Borosilicate glass 5. 1 is more stable than soda lime glass and is therefore insensitive to rapid temperature changes and chemical stress. Material properties ensure chemical resistance to acid and