Essential Glassware set made of high quality, heavy duty, borosilicate 3.3 glass. Includes three, narrow low form Beakers in 50ml, 100ml & 250ml capacities, three ASTM, Class A Measuring Cylinders in 10ml, 50ml & 100ml capacities and three Erlenmeyer Flasks in 50ml, 100ml & 250ml capacities. Beakers and flasks feature white, printed graduations, and beaded rims. Cylinders feature blue printed graduations, hexagonal bases and removable, plastic protective collars for added stability. Uniform, thick walls provide excellent strength against breakage. Set is packaged in a custom fit, thick foam casing, for safe storage and worry free transport.Microwavable and autoclavable, with superior chemical durability. Low temperature gradient- can withstand high temperatures & thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.