It is made from high-quality Boro 3.3 glass, offering excellent durability and thermal resistance. This 250 mL flask features parallel side necks: CN NS 29/32 and SN 2x NS 14/23, designed for complex laboratory reactions requiring multiple connections. The parallel neck design ensures compatibility with various laboratory equipment, while the round bottom promotes efficient mixing and heating. Ideal for chemical synthesis, distillation, and other laboratory processes that require precise temperature control and multiple apparatus connections.