Round bottom boiling flasks with three necks of equal socket joints.

• 24/40 ground glass joints
• Made from heavy-duty ASTM E-438 Type 1, Borosilicate 3.3 glass
• Strain point: 515 °C
• Annealing point: 565 °C
• Softening point: 820 °C

Three-necked boiling flasks with ground glass 24/40 joints are made from low-expansion borosilicate glass. Flasks feature uniform wall thickness for superior mechanical strength and hand shock resistance.