These high-quality borosilicate glass conical flasks 50mL, 100ml, 250ml or 500ml come in a convenient pack of 12, ideal for kitting out or restocking your laboratory!
 
Marked clearly by the printed graduations at 25mL intervals for 50ml & 100ml flasks, 50ml intervals for 250ml flasks and 100ml intervals for 500ml flasks, these permanent printed graduations make precise measuring easy for all students, and ensure that these flasks have a long lifespan in your school’s laboratory!
 
Borosilicate 3.3 glass is used to create these flasks, as it has excellent chemical and heat resistance, and a tough structural integrity which helps to prevent cracks or breakages. These conical flasks are highly durable and are perfect for classroom use. Suitable for use in microwaves and autoclaves, and able to withstand significant thermal shocks and extreme temperatures.
 
Heat Tolerances
Strain Point: -515°C
Annealing Point: 565°C
Softening Point: 820°C