Bomex Brand 250ml Boiling Flask is made of borosilicate (heat resistant) glass with long neck and round bottom.  Borosilicate glass flasks are designed to give the best combination of thermal shock resistance, physical strength and resistance to chemical attack.

Dimensions:

• Neck OD – 1 5/16 inches
• Flask OD – 3 1/4 inches
• Height – 5 1/2 inches

Flask takes a size 6 Rubber Stopper or a size 18 Cork Stopper.