These 500 mL round bottom flasks, made from high-grade borosilicate glass, are built to withstand direct heating and thermal shock. Ideal for refluxing, boiling, and chemical synthesis, they allow uniform heating due to their spherical design. Resistant to most chemicals, they're reusable and autoclavable. This pack of 2 ensures lab continuity and convenience across multiple experiments. An excellent choice for professionals and students in science labs.