High quality Borosilicate 3.3 glass with 5 mm thick walls provide maximum durability and strength against breakage.

• Uniform, thick walls provide increased durability and stability
• Beaded rim and spout for easy pouring
• Easy to read, chemical resistant white printed graduations
• Superior heat tolerance and chemical resistance
• Autoclavable at 121 °C

Eisco heavy duty beakers are made of high-quality Borosilicate 3.3 glass. These durable glass beakers have a low temperature gradient and can withstand high temperatures as well as thermal shocks. They are microwaveable, autoclavable, and have superior chemical durability. These heavy-duty beakers are calibrated within a 5% tolerance. Eisco Labs Borosilicate glass has the following heat tolerances: Strain point −515 °C, annealing point 565 °C, softening point 820 °C.