Borosilicate glass 3.3. DURAN®, Gay-Lussac type.

• The density bottles (pycnometers) are individually engraved with the actual capacity, with an accuracy of 0,001 cm³
• The top of stopper is ground and polished for ease of wiping clean
• Stopper is size NS 10/19 with capillary

* DIN ISO 3507