DescriptionAre you in search of a sturdy, trustworthy flaskthat can do multiple jobs at once? Are you looking for a professional, yet affordable flask?If yes, look no further! Our single neck laboratory flask might be your best choices.Features-Color: Transparent-Material: glass-Size: 19.00X13.10X13.10cm7.47X5.15X5.15inch- Made from high-quality material for long time and durable use. - Well-polished and free of rough edges, does not hurt hands when use. - Great forsimple distillation, steam distillation,leak-freeandeasy-operation.- Widely used for education, chemistry, research, or life science applications. - More resistant to fracture under vacuum because the sphere distributes the stress more evenly .