Borosilicate glass 3,3, DIN ISO 3507, Gay-Lussac type.
Bottle and stopper (with capillary) are marked with unique matching identification number
Individual certificate included
Reference temperature: 20 °C
The density bottles (pycnometers) are individually adjusted. The nominal capacity is indelibly engraved on each bottle. Each bottle is calibrated with its own stopper. The volume in cm3 is specified to a precision of 3 decimal places.