Made of classy plastic material, durable, and practical using. Standard 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 - ColorTransparent - Material: Plastic - Packing Size: 16.50X10.00X5.00cm/6.48X3.93X1.97in - These plastic flasks have professional and practical design, which can prevent spatter of liquid from bottle effectively. - Wide mouth design makes it more easy to clean and refill liquid, clear enough for you to read the data with precise scale design. - Compact size, convenient and easy to store and carry. It won' take up many spaces on the desktop or in the drawer. - Suitable for students in school laboratory when doing experiments in the chemistry class, good seal can protect the liquid very well. - Made of , no smell, no harm, and durable for people to use, especially the students can use it with ease. Package list: 2 x 50ml flask 2 x 100ml flask 2 x 500ml flask