This is a Bomex-brand borosilicate(heat resistant) glass round bottom boiling flask can hold up to 5000mL (5 liters) of solution.  Bomex glass flasks are designed to give the best combination of thermal shock resistance, physical strength and resistance to chemical attack. A size 11 rubber stopper will fit this flask. It is not included, and needs to be purchased separately.

• Height – 34.5cm (13.6 inches)
• Neck  OD – 5.7cm (2.2 inches)
• Neck ID – 5cm  (2 inches)