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. 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.