Description Made of glass material, , and practical using. Standard 100ml, 250ml and 50ml capacity: clear scale, easier to identify for accurate measurement. No bubbles, no burrs, smooth and rounded. More convenient to use for students in school when doing experiments in chemistry class. Features - Bottom Color: Transparent. - Stopper Color: Random Color. - Size: 14.00X8.40X8.40 cm/ 5.50X3.30X3.30 inch. - The flask is made of good glass material for and long lasting use. - Clear and accurate graduation, easy for you to look when doing experiment. - Suitable for beginners or professional use, also the students. - A good tool for science study, can exercise various chemical experiments. - It is a good choice as a gift for your kids at school if they do experiments in the laboratory. The flask is made of good glass material for and long lasting use. Clear and accurate graduation, easy for you to look when doing experiment. Suitable for beginners or professional use, also the students. A good tool for science study, can exercise various chemical experiments. It is a good choice as a gift for your kids at school if they do experiments in the laboratory.