Borosilicate glass 3.3. Duran®, DIN 12809, ISO 3507, Gay-Lussac type.

• Thermometer range of 10 to 35 °C
• Thermometer has 0,2 °C divisions
• 100 cm³ bottle is not according to DIN

The density bottles (pyknometers) are individually engraved with the actual capacity, with an accuracy of 0,001 cm³. The bottle has a side arm with capillary with conical ground glass cap. The toluene thermometer has a frosted, enclosed glass scale.