Description Are you looking for a creative and practical flask for your laboratory experiment? Our production can meet all your requirements with durable and reliable material for long service time. It is designed with clear scale and exquisite workmanship for high temperature resistance with wide using range. Features - Color: Transparent. - Material: High borosilicate glass. - Size: 13.00X6.00X4.50cm/5.11X2.36X1.77inch. - Made of eco-friendly high borosilicate glass material, durable, and odorless. - Standard capacity: clear scale, easier to identify for accurate measurement. - Excellent product quality, with quality assurance. No bubbles, no burrs, smooth and rounded. - More convenient to use for students in school when doing experiments in chemistry class. - With a bottle plug for free, it is more practical and safer to use when heating. The flask is made of good material for durable 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.