This is a set of watch glasses, craftsmanship and glass materials ensure its safety and durability. It can be used for beakers lids and watch glasses for liquid mixing in scientific experiments. The clever design its popularity in laboratory tools. Features -Color:Transparent -Material:Glass -Size:10.00X10.00X0.20cm/3.93X3.93X0.08in - The watch glass with high chemical durability, thus preventing contaminations of solutions. - After careful polishing, the surface is smooth and burr-free, safe, practical and . - It has a wide range of uses and can be used for the mixing of experimental liquids, the storage of samples and the lid of the beakers. - The compact size design is convenient for its storage, simple operation and convenient use. - In addition to covering beakers and flasks, watch glasses are useful for holding samples under low power microscopes. Package list: 10 glasses